Check for C++11 when building C++ probe providers

[lttng-ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 998981ac1ec90bed41f74f189027761428baa0be..86b1d052393846c8a7da13df2b5e1630cd602b09 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -7,12 +7,12 @@ dnl Process this file with autoconf to produce a configure script.
 
 # Project version information
 m4_define([ust_version_major], [2])
 
 # Project version information
 m4_define([ust_version_major], [2])

-m4_define([ust_version_minor], [13])
+m4_define([ust_version_minor], [14])

 m4_define([ust_version_patch], [0])
 m4_define([ust_version_dev_stage], [-pre])
 m4_define([ust_version], ust_version_major[.]ust_version_minor[.]ust_version_patch[]ust_version_dev_stage)
 m4_define([ust_version_patch], [0])
 m4_define([ust_version_dev_stage], [-pre])
 m4_define([ust_version], ust_version_major[.]ust_version_minor[.]ust_version_patch[]ust_version_dev_stage)

-m4_define([ust_version_name], [[Codename TBD]])
-m4_define([ust_version_description], [[Description TBD]])
+m4_define([ust_version_name], [[O-Beer]])
+m4_define([ust_version_description], [[An alcoholic drink made from yeast-fermented malt flavored with hops.]])

 
 # Library version information of "liblttng-ust"
 # Following the numbering scheme proposed by libtool for the library version
 
 # Library version information of "liblttng-ust"
 # Following the numbering scheme proposed by libtool for the library version


@@ -38,10 +38,9 @@ m4_define([ust_ctl_lib_version], ust_ctl_lib_version_current[:]ust_ctl_lib_versi
 AC_PREREQ([2.69])
 AC_INIT([lttng-ust],[ust_version],[mathieu dot desnoyers at efficios dot com],[],[https://lttng.org])
 
 AC_PREREQ([2.69])
 AC_INIT([lttng-ust],[ust_version],[mathieu dot desnoyers at efficios dot com],[],[https://lttng.org])
 

-AC_CONFIG_HEADERS([include/config.h include/lttng/ust-config.h include/lttng/ust-version.h])
+AC_CONFIG_HEADERS([src/common/config.h include/lttng/ust-config.h include/lttng/ust-version.h])

 AC_CONFIG_AUX_DIR([config])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([config])
 AC_CONFIG_MACRO_DIR([m4])

-AC_CONFIG_SRCDIR([include/lttng/tracepoint.h])

 
 AC_CANONICAL_TARGET
 AC_CANONICAL_HOST
 
 AC_CANONICAL_TARGET
 AC_CANONICAL_HOST


@@ -58,6 +57,36 @@ AM_MAINTAINER_MODE([enable])
 AM_SILENT_RULES([yes])
 
 
 AM_SILENT_RULES([yes])
 
 

+##                               ##
+## OS and Arch specific defaults ##
+##                               ##
+
+# Set os specific options
+AS_CASE([$host_os],
+  [freebsd*], [AE_FEATURE_DISABLE([numa])]
+)
+
+# Set architecture specific options
+AS_CASE([$host_cpu],
+  [i[[3456]]86], [],
+  [x86_64], [],
+  [amd64], [],
+  [powerpc], [],
+  [ppc64], [],
+  [ppc64le], [],
+  [powerpc64], [],
+  [powerpc64le], [],
+  [s390], [],
+  [s390x], [],
+  [arm*], [AE_FEATURE_DISABLE([numa])],
+  [aarch64*], [],
+  [mips*], [],
+  [tile*], [],
+  [
+    unsupported_arch="yes"
+  ])
+
+

 ##                   ##
 ## C compiler checks ##
 ##                   ##
 ##                   ##
 ## C compiler checks ##
 ##                   ##


@@ -106,6 +135,55 @@ AC_TYPE_UINT64_T
 AC_TYPE_UINT8_T
 AC_CHECK_TYPES([ptrdiff_t])
 
 AC_TYPE_UINT8_T
 AC_CHECK_TYPES([ptrdiff_t])
 

+# Detect warning flags supported by the C compiler and append them to
+# WARN_CFLAGS.
+m4_define([WARN_FLAGS_LIST], [ dnl
+  -Wall dnl
+  -Wextra dnl
+  -Wmissing-prototypes dnl
+  -Wmissing-declarations dnl
+  -Wnull-dereference dnl
+  -Wundef dnl
+  -Wshadow dnl
+  -Wjump-misses-init dnl
+  -Wsuggest-attribute=format dnl
+  -Wtautological-constant-out-of-range-compare dnl
+  -Wnested-externs dnl
+  -Wwrite-strings dnl
+  -Wformat=2 dnl
+  -Wstrict-aliasing dnl
+  -Wmissing-noreturn dnl
+  -Winit-self dnl
+  -Wduplicated-cond dnl
+  -Wduplicated-branches dnl
+  -Wlogical-op dnl
+  dnl These would require reworking the tracepoint macros
+  dnl-Wredundant-decls dnl
+  -Wno-sign-compare dnl
+  -Wno-missing-field-initializers dnl
+  -Wno-null-dereference dnl
+])
+
+# Pass -Werror as an extra flag during the test: this is needed to make the
+# -Wunknown-warning-option diagnostic fatal with clang.
+AC_LANG_PUSH([C])
+AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CFLAGS], [-Werror])
+AC_LANG_POP([C])
+
+# The test used in AX_APPEND_COMPILE_FLAGS, generated using AC_LANG_PROGRAM, is
+# written in such a way that it triggers warnings with the following warning
+# flags.  So they would always end up disabled if we put them there, because
+# the test program would not build.
+#
+# Enable them here unconditionally.  They are supported by GCC >= 4.8 and by
+# Clang >= 3.3 (required by the project) and are only valid for C code.
+WARN_CFLAGS="${WARN_CFLAGS} -Wold-style-definition -Wstrict-prototypes"
+
+# Disable 'strict aliasing' if the compiler supports it.
+AC_LANG_PUSH([C])
+AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [OPT_CFLAGS], [-Werror])
+AC_LANG_POP([C])
+

 
 ##                     ##
 ## C++ compiler checks ##
 
 ##                     ##
 ## C++ compiler checks ##


@@ -113,7 +191,14 @@ AC_CHECK_TYPES([ptrdiff_t])
 
 # Find an optional C++11 compiler without GNU extensions (-std=c++11)
 AX_CXX_COMPILE_STDCXX([11], [noext], [optional])
 
 # Find an optional C++11 compiler without GNU extensions (-std=c++11)
 AX_CXX_COMPILE_STDCXX([11], [noext], [optional])

-AM_CONDITIONAL([HAVE_CXX], [test "$HAVE_CXX11" = "1"])
+
+AS_IF([test "$HAVE_CXX11" = "1"], [
+  # Pass -Werror as an extra flag during the test: this is needed to make the
+  # -Wunknown-warning-option diagnostic fatal with clang.
+  AC_LANG_PUSH([C++])
+  AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST -Wno-undef -Wno-duplicated-branches], [WARN_CXXFLAGS], [-Werror])
+  AC_LANG_POP([C++])
+])

 
 
 ##               ##
 
 
 ##               ##


@@ -158,308 +243,271 @@ AC_CHECK_PROGS([XMLTO], [xmlto])
 
 AM_PATH_PYTHON([2.7], [], [PYTHON=""])
 
 
 AM_PATH_PYTHON([2.7], [], [PYTHON=""])
 

-AX_PROG_JAVAC
-AX_PROG_JAVA
-AX_PROG_JAR
-

 # Initialize and configure libtool
 LT_INIT([disable-static])
 
 
 # Initialize and configure libtool
 LT_INIT([disable-static])
 
 

-AM_CONDITIONAL([HAVE_CMAKE], [test "x$CMAKE" != "x"])
-
-AC_MSG_CHECKING([whether shared libraries are enabled])
-AS_IF([test "x$enable_shared" = "xyes"], [
-       AC_MSG_RESULT([yes])
-], [
-       AC_MSG_RESULT([no])
-       AC_MSG_ERROR([LTTng-UST requires shared libraries to be enabled])
-])
+##                ##
+## Library checks ##
+##                ##

 
 

-# Checks for library functions.

 AC_FUNC_CHOWN
 AC_FUNC_FORK
 AC_FUNC_MMAP
 AC_FUNC_CHOWN
 AC_FUNC_FORK
 AC_FUNC_MMAP

-AC_FUNC_REALLOC

 AC_FUNC_STRERROR_R
 AC_FUNC_STRNLEN
 AC_CHECK_FUNCS([ \
 AC_FUNC_STRERROR_R
 AC_FUNC_STRNLEN
 AC_CHECK_FUNCS([ \

-       atexit \
-       clock_gettime \
-       ftruncate \
-       getpagesize \
-       gettimeofday \
-       localeconv \
-       memchr \
-       memmove \
-       memset \
-       mkdir \
-       munmap \
-       realpath \
-       sched_getcpu \
-       socket \
-       strchr \
-       strdup \
-       strerror \
-       strtol \
-       strtoul \
-       sysconf \
+  atexit \
+  clock_gettime \
+  ftruncate \
+  getpagesize \
+  gettid \
+  gettimeofday \
+  localeconv \
+  memchr \
+  memmove \
+  memset \
+  mkdir \
+  munmap \
+  realpath \
+  sched_getcpu \
+  socket \
+  strchr \
+  strdup \
+  strerror \
+  strtol \
+  strtoul \
+  sysconf \

 ])
 
 ])
 

-# Check for pthread_setname_np and its signature
-LTTNG_PTHREAD_SETNAME_NP
-LTTNG_PTHREAD_GETNAME_NP
-

 # AC_FUNC_MALLOC causes problems when cross-compiling.
 #AC_FUNC_MALLOC
 # AC_FUNC_MALLOC causes problems when cross-compiling.
 #AC_FUNC_MALLOC

+#AC_FUNC_REALLOC

 
 

-# Set architecture specific options
-AS_CASE([$host_cpu],
-       [i[[3456]]86], [],
-       [x86_64], [],
-       [amd64], [],
-       [powerpc], [],
-       [ppc64], [],
-       [ppc64le], [],
-       [powerpc64], [],
-       [powerpc64le], [],
-       [s390], [],
-       [s390x], [],
-       [arm*], [
-               NO_NUMA=1
-               ],
-       [aarch64*], [],
-       [mips*], [],
-       [tile*], [],
-       [
-               UNSUPPORTED_ARCH=1
-       ])
-
-# Set os specific options
-AS_CASE([$host_os],
-       [freebsd*], [NO_NUMA=1]
-)
-
-# Configuration options, which will be installed in the config.h
-AH_TEMPLATE([LTTNG_UST_HAVE_SDT_INTEGRATION], [SystemTap integration via sdt.h])
+# Check for pthread_setname_np and its signature
+LTTNG_PTHREAD_SETNAME_NP
+LTTNG_PTHREAD_GETNAME_NP

 
 

-# Checks for libraries.
+# Check dor dlopen() in -ldl or -lc

 AC_CHECK_LIB([dl], [dlopen], [
 AC_CHECK_LIB([dl], [dlopen], [

-       libdl_name=dl
-       DL_LIBS="-ldl"
+  libdl_name=dl
+  DL_LIBS="-ldl"

 ], [
 ], [

-       #libdl not found, check for dlopen in libc.
-       AC_CHECK_LIB([c], [dlopen], [
-               libdl_name=c
-               DL_LIBS="-lc"
-       ], [
-               AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
-       ])
+  # dlopen not found in libdl, check in libc
+  AC_CHECK_LIB([c], [dlopen], [
+    libdl_name=c
+    DL_LIBS="-lc"
+  ], [
+    AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
+  ])

 ])
 AC_SUBST(DL_LIBS)
 
 ])
 AC_SUBST(DL_LIBS)
 

-# Check if libdl has dlmopen support.
-AH_TEMPLATE([HAVE_DLMOPEN], ["Define to 1 if dlmopen is available."])
-AC_CHECK_LIB([$libdl_name], [dlmopen],
-       [AC_DEFINE([HAVE_DLMOPEN], [1])]
-)
-
-AM_CONDITIONAL([ENABLE_UST_DL], [test "x${ac_cv_have_decl_RTLD_DI_LINKMAP}" = "xyes"])
+# Check if libdl has dlmopen()
+AC_CHECK_LIB([$libdl_name], [dlmopen], [
+  AC_DEFINE([HAVE_DLMOPEN], [1], [Define to 1 if dlmopen is available.])
+])

 
 # Require URCU >= 0.12 for DEFINE_URCU_TLS_INIT
 PKG_CHECK_MODULES([URCU], [liburcu >= 0.12])
 
 
 # Require URCU >= 0.12 for DEFINE_URCU_TLS_INIT
 PKG_CHECK_MODULES([URCU], [liburcu >= 0.12])
 

-# numa.h integration
-AS_IF([test "x$NO_NUMA" = "x1"],[
-      AS_IF([test "x$enable_numa" = "x" ], [enable_numa=no])
-])

 
 

-AC_ARG_ENABLE([numa], [
-AS_HELP_STRING([--disable-numa], [disable NUMA support])
-], [
-       enable_numa=$enableval
-], [
-       enable_numa=yes
-])
+##                 ##
+## User variables  ##
+##                 ##

 
 

-AS_IF([test "x$enable_numa" = "xyes"], [
-       # numa - check that numa lib is available
-       AC_CHECK_LIB([numa], [numa_available], [],
-[AC_MSG_ERROR([libnuma is not available. Please either install it (e.g. libnuma-dev) or use [LDFLAGS]=-Ldir to specify the right location, or use --disable-numa configure argument to disable NUMA support.])])
-       have_libnuma=yes
-])
-AM_CONDITIONAL([ENABLE_NUMA], [test "x$have_libnuma" = "xyes"])
+# Additional variables captured during ./configure

 
 

-AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$ac_cv_header_linux_perf_event_h" = "xyes"])
+AC_ARG_VAR([CLASSPATH], [Java class path])

 
 

-# Check for JNI header files if requested
-AC_ARG_ENABLE([jni-interface], [
-AS_HELP_STRING([--enable-jni-interface], [build JNI interface between C and Java. Needs Java include files [default=no]])
-], [
-       jni_interface=$enableval
-], [
-       jni_interface=no
-])

 
 

-AM_CONDITIONAL([ENABLE_JNI_INTERFACE], [test "x$jni_interface" = "xyes"])
+##                              ##
+## Optional features selection ##
+##                              ##

 
 

+# numa integration
+# Enabled by default, except on some platforms
+AE_FEATURE_DEFAULT_ENABLE
+AE_FEATURE([numa],[disable NUMA support])

 
 

-AC_ARG_ENABLE([java-agent-jul], [
-AS_HELP_STRING([--enable-java-agent-jul], [build the LTTng UST Java agent with JUL support [default=no]])
-], [
-       java_agent_jul=$enableval
-], [
-       java_agent_jul=no
-])
+# Java JNI interface library
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([jni-interface], [build JNI interface between C and Java])

 
 

-AC_ARG_ENABLE([java-agent-log4j], [
-AS_HELP_STRING([--enable-java-agent-log4j], [build the LTTng UST Java agent with Log4j support [default=no]])
-], [
-       java_agent_log4j=$enableval
-], [
-       java_agent_log4j=no
-])
+# Build the Java Logging API agent
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([java-agent-jul],[build the LTTng UST Java agent with JUL support])

 
 

-AC_ARG_ENABLE([java-agent-all], [
-AS_HELP_STRING([--enable-java-agent-all], [build the LTTng UST Java agent with all supported backends [default=no]])
-], [
-       java_agent_jul=$enableval
-       java_agent_log4j=$enableval
-], [:])
-
-AM_CONDITIONAL([ENABLE_JAVA_AGENT], [test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"])
-AM_CONDITIONAL([ENABLE_JAVA_AGENT_WITH_JUL], [test "x$java_agent_jul" = "xyes"])
-AM_CONDITIONAL([ENABLE_JAVA_AGENT_WITH_LOG4J], [test "x$java_agent_log4j" = "xyes"])
-
-AS_IF([test "x$jni_interface" = "xyes" || test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"], [
-       AX_JAVA_OPTIONS
-       AC_ARG_VAR([CLASSPATH], [Java class path])
-
-       AX_JNI_INCLUDE_DIR
-       for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
-       do
-               JNI_CPPFLAGS="$JNI_CPPFLAGS -I$JNI_INCLUDE_DIR"
-       done
-
-       saved_CPPFLAGS="$CPPFLAGS"
-       CPPFLAGS="$CPPFLAGS $JNI_CPPFLAGS"
-       AX_PROG_JAVAH
-       CPPFLAGS="$saved_CPPFLAGS"
-])
+# Build the Java Log4j agent
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([java-agent-log4j],[build the LTTng UST Java agent with Log4j support])

 
 

-AM_CONDITIONAL([HAVE_JAVAH], [test "x$JAVAH" != "x"])
+# Build both Java agents
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([java-agent-all],[build the LTTng UST Java agent with all supported backends])

 
 

-AS_IF([test "x$java_agent_log4j" = "xyes"], [
-       AX_CHECK_CLASSPATH
-       AX_CHECK_CLASS([org.apache.log4j.Logger])
-       AS_IF([test "x$ac_cv_class_org_apache_log4j_Logger" = "xno"], [
-               AC_MSG_ERROR([The UST Java agent support for log4j was requested but the Log4j classes were not found. Please specify the location of the Log4j jar via the Java CLASSPATH e.g: export CLASSPATH="/path/to/log4j.jar"])
-       ])
-])
+# Build the Python agent
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([python-agent],[build the LTTng UST Python agent])

 
 

-# Option to build the python agent
-AC_ARG_ENABLE([python-agent], [
-AS_HELP_STRING([--enable-python-agent], [build the LTTng UST Python agent [default=no]])
-], [
-       python_agent=$enableval
-], [:])
-AM_CONDITIONAL([ENABLE_PYTHON_AGENT], [test "x$python_agent" = "xyes"])
+# Build the examples
+# Disabled by default
+AE_FEATURE_DEFAULT_ENABLE
+AE_FEATURE([examples],[Do not build and install examples])

 
 

-# sdt.h integration
-AC_ARG_WITH([sdt], [
-AS_HELP_STRING([--with-sdt], [provide SystemTap integration via sdt.h [default=no]])
-], [
-       with_sdt=$withval
-], [
-       with_sdt="no"
-])
+# Man pages
+# Enabled by default
+AE_FEATURE_DEFAULT_ENABLE
+AE_FEATURE([man-pages],[Do not build and install man pages (already built in a distributed tarball)])

 
 

-AS_IF([test "x$with_sdt" = "xyes"], [
-       AC_MSG_CHECKING([STAP_PROBEV()])
-       AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
-               #define SDT_USE_VARIADIC
-               #include <sys/sdt.h>
-               void fct(void)
-               {
-                       STAP_PROBEV(provider,name,1,2,3,4,5,6,7,8,9,10);
-               }
-       ]])], [
-               AC_MSG_RESULT([yes])
-               AC_DEFINE([LTTNG_UST_HAVE_SDT_INTEGRATION], [1])
-       ], [
-               AC_MSG_RESULT([no])
-               AC_MSG_ERROR([The sdt.h integration was requested but the STAP_PROBEV define cannot be used. Make sure it is installed, and up to date, or use CPPFLAGS=-I/path/ to specify a non-standard path to sys/sdt.h])
-       ])
-])
+# Systemtap sdt.h integration
+# Disabled by default
+AC_ARG_WITH([sdt],
+  [AS_HELP_STRING([--with-sdt], [provide SystemTap integration via sdt.h [default=no]])]
+)

 
 

+# Override the default runtime directory

 AC_ARG_WITH([lttng-system-rundir], [
 AS_HELP_STRING([--with-lttng-system-rundir], [Location of the system directory where LTTng-UST expects the system-wide lttng-sessiond runtime files. The default is "/var/run/lttng".]),
 ], [
 AC_ARG_WITH([lttng-system-rundir], [
 AS_HELP_STRING([--with-lttng-system-rundir], [Location of the system directory where LTTng-UST expects the system-wide lttng-sessiond runtime files. The default is "/var/run/lttng".]),
 ], [

-       lttng_system_rundir="$withval"
+  lttng_system_rundir="$withval"

 ], [
 ], [

-       lttng_system_rundir="/var/run/lttng"
+  lttng_system_rundir="/var/run/lttng"

 ])
 ])

-AC_DEFINE_UNQUOTED([LTTNG_SYSTEM_RUNDIR], ["$lttng_system_rundir"],
-               [LTTng system runtime directory])

 
 

-AM_CONDITIONAL([ENABLE_GEN_TP_EXAMPLES], [test "x$PYTHON" != "x"])
+# Add the java command line arguments like '--wit-java-prefix'
+AX_JAVA_OPTIONS

 
 

-# Enable building examples
-AC_ARG_ENABLE(
-       examples,
-       AS_HELP_STRING(
-               [--disable-examples],
-               [Do not build and install examples]
-       ),
-       [enable_examples=$enableval],
-       [enable_examples=yes]
-)

 
 

-AM_CONDITIONAL([ENABLE_EXAMPLES], [test "x$enable_examples" != "xno"])
-
-# Enable building man pages (user's intention).
-AC_ARG_ENABLE(
-       man-pages,
-       AS_HELP_STRING(
-               [--disable-man-pages],
-               [Do not build and install man pages (already built in a distributed tarball)]
-       ),
-       [man_pages_opt=$enableval],
-       [man_pages_opt=yes]
-)
+##                                          ##
+## Check for conflicting features selection ##
+##                                          ##
+
+AE_IF_FEATURE_DISABLED([shared], [
+  AC_MSG_ERROR(LTTng-UST requires shared libraries to be enabled)
+])
+
+AE_IF_FEATURE_ENABLED([java-agent-all], [
+  AE_FEATURE_ENABLE([java-agent-jul])
+  AE_FEATURE_ENABLE([java-agent-log4j])
+])
+
+
+##                                          ##
+## Check for optional features dependencies ##
+##                                          ##
+
+# The numa integration requires libnuma
+AE_IF_FEATURE_ENABLED([numa], [
+  AC_CHECK_LIB([numa], [numa_available], [], [
+    AC_MSG_ERROR([dnl
+libnuma is not available. Please either install it (e.g. libnuma-dev) or use
+[LDFLAGS]=-Ldir to specify the right location, or use --disable-numa configure
+argument to disable NUMA support.
+    ])
+  ])
+])
+
+# The JNI interface and Java Agents require a working Java JDK
+AS_IF([AE_IS_FEATURE_ENABLED([jni-interface]) || AE_IS_FEATURE_ENABLED([java-agent-jul]) || AE_IS_FEATURE_ENABLED([java-agent-log4j])], [
+  AX_PROG_JAVAC
+  AX_PROG_JAVA
+  AX_PROG_JAR
+
+  # Get the CPPFLAGS required to build jni libraries
+  AX_JNI_INCLUDE_DIR
+  for jni_include_dir in $JNI_INCLUDE_DIRS; do
+    JNI_CPPFLAGS="$JNI_CPPFLAGS -I$jni_include_dir"
+  done
+
+  # Check for javah and jni.h
+  saved_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $JNI_CPPFLAGS"
+  AX_PROG_JAVAH
+  CPPFLAGS="$saved_CPPFLAGS"
+])
+
+# The log4j agent requires the log4j jar in the classpath
+AE_IF_FEATURE_ENABLED([java-agent-log4j], [
+  AX_CHECK_CLASS([org.apache.log4j.Logger])
+  AS_IF([test "x$ac_cv_class_org_apache_log4j_Logger" = "xno"], [
+    AC_MSG_ERROR([dnl
+The UST Java agent support for log4j was requested but the Log4j classes were
+not found. Please specify the location of the Log4j jar via the Java CLASSPATH
+environment variable, e.g. ./configure CLASSPATH="/path/to/log4j.jar"
+
+Current CLASSPATH: "$CLASSPATH"
+    ])
+  ])
+])
+
+# The python agent requires a python interpreter
+AE_IF_FEATURE_ENABLED([python-agent], [
+  AS_IF([test "x$PYTHON" = "x"], [
+    AC_MSG_ERROR([dnl
+Cannot find a suitable python interpreter. You can override it with the PYTHON
+environment variable.
+    ])
+  ])
+])

 
 # Check for asciidoc and xmlto if we enabled building the man pages.
 
 # Check for asciidoc and xmlto if we enabled building the man pages.

-have_asciidoc_xmlto=no
-warn_prebuilt_man_pages=no
-
-AS_IF([test "x$man_pages_opt" = "xyes"], [
-       AS_IF([test "x$ASCIIDOC" = "x" || test "x$XMLTO" = "x"], [
-               AE_IF_IN_GIT_REPO([
-                       # This is an error because we're in the Git repo, which
-                       # means the man pages are not already generated for us,
-                       # thus asciidoc/xmlto are required because we were asked
-                       # to build the man pages.
-                       AC_MSG_ERROR([
+AE_IF_FEATURE_ENABLED([man-pages], [
+  AS_IF([test "x$ASCIIDOC" = "x" || test "x$XMLTO" = "x"], [
+    AE_IF_IN_GIT_REPO([
+      # This is an error because we're in the Git repo, which
+      # means the man pages are not already generated for us,
+      # thus asciidoc/xmlto are required because we were asked
+      # to build the man pages.
+      AC_MSG_ERROR([dnl

 Both asciidoc and xmlto are needed to build the LTTng-UST man pages. Use
 --disable-man-pages to disable building the man pages, in which case
 they will not be installed.
 Both asciidoc and xmlto are needed to build the LTTng-UST man pages. Use
 --disable-man-pages to disable building the man pages, in which case
 they will not be installed.

-                       ])
-               ], [
-                       # Only warn here: since we're in the tarball, the man
-                       # pages should already be generated at this point, thus
-                       # asciidoc/xmlto are not strictly required.
-                       warn_prebuilt_man_pages=yes
-               ])
-       ], [
-               have_asciidoc_xmlto=yes
-       ])
+      ])
+    ], [
+      # Only warn here: since we're in the tarball, the man
+      # pages should already be generated at this point, thus
+      # asciidoc/xmlto are not strictly required.
+      warn_prebuilt_man_pages=yes
+    ])
+  ], [
+    have_asciidoc_xmlto=yes
+  ])
+])
+
+AS_IF([test "x$with_sdt" = "xyes"], [
+  AC_MSG_CHECKING([STAP_PROBEV()])
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+    #define SDT_USE_VARIADIC
+    #include <sys/sdt.h>
+    void fct(void)
+    {
+      STAP_PROBEV(provider,name,1,2,3,4,5,6,7,8,9,10);
+    }
+  ]])], [
+    AC_MSG_RESULT([yes])
+    AC_DEFINE([LTTNG_UST_HAVE_SDT_INTEGRATION], [1], [SystemTap integration via sdt.h])
+  ], [
+    AC_MSG_RESULT([no])
+    AC_MSG_ERROR([dnl
+The sdt.h integration was requested but the STAP_PROBEV define cannot be used.
+Make sure it is installed, and up to date, or use CPPFLAGS=-I/path/ to specify
+a non-standard path to sys/sdt.h
+    ])
+  ])

 ])
 
 ])
 

-# Export man page build condition: build the man pages if the user
-# asked for it, and if the tools are available.
-AM_CONDITIONAL([ENABLE_MAN_PAGES], [test "x$man_pages_opt" != "xno"])
-AM_CONDITIONAL([HAVE_ASCIIDOC_XMLTO], [test "x$have_asciidoc_xmlto" = "xyes"])

 
 

+##                                                                    ##
+## Set defines for optional features conditionnals in the source code ##
+##                                                                    ##
+
+AC_DEFINE_UNQUOTED([LTTNG_SYSTEM_RUNDIR], ["$lttng_system_rundir"], [LTTng system runtime directory])

 
 # Defined in include/lttng/ust-version.h
 AC_DEFINE([LTTNG_UST_MAJOR_VERSION], ust_version_major, [LTTng UST major version])
 
 # Defined in include/lttng/ust-version.h
 AC_DEFINE([LTTNG_UST_MAJOR_VERSION], ust_version_major, [LTTng UST major version])


@@ -470,16 +518,48 @@ AC_DEFINE([LTTNG_UST_LIB_SONAME_MAJOR], [ust_lib_version_current], [Major SONAME
 AC_DEFINE([LTTNG_UST_CTL_LIB_SONAME_MAJOR], [ust_ctl_lib_version_current], [Major SONAME number of liblttng-ust-ctl])
 
 
 AC_DEFINE([LTTNG_UST_CTL_LIB_SONAME_MAJOR], [ust_ctl_lib_version_current], [Major SONAME number of liblttng-ust-ctl])
 
 

-AM_CFLAGS="-Wall $URCU_CFLAGS $PTHREAD_CFLAGS"
+##                                                                          ##
+## Set automake variables for optional feature conditionnals in Makefile.am ##
+##                                                                          ##
+
+AM_CONDITIONAL([ENABLE_EXAMPLES], AE_IS_FEATURE_ENABLED([examples]))
+AM_CONDITIONAL([ENABLE_GEN_TP_EXAMPLES], [test "x$PYTHON" != "x"])
+AM_CONDITIONAL([ENABLE_JAVA_AGENT], AE_IS_FEATURE_ENABLED([java-agent-jul]) || AE_IS_FEATURE_ENABLED([java-agent-log4j]))
+AM_CONDITIONAL([ENABLE_JAVA_AGENT_WITH_JUL], AE_IS_FEATURE_ENABLED([java-agent-jul]))
+AM_CONDITIONAL([ENABLE_JAVA_AGENT_WITH_LOG4J], AE_IS_FEATURE_ENABLED([java-agent-log4j]))
+AM_CONDITIONAL([ENABLE_JNI_INTERFACE], AE_IS_FEATURE_ENABLED([jni-interface]))
+AM_CONDITIONAL([ENABLE_MAN_PAGES], AE_IS_FEATURE_ENABLED([man-pages]))
+AM_CONDITIONAL([ENABLE_NUMA], AE_IS_FEATURE_ENABLED([numa]))
+AM_CONDITIONAL([ENABLE_PYTHON_AGENT], AE_IS_FEATURE_ENABLED([python-agent]))
+AM_CONDITIONAL([ENABLE_UST_DL], [test "x$ac_cv_have_decl_RTLD_DI_LINKMAP" = "xyes"])
+AM_CONDITIONAL([HAVE_ASCIIDOC_XMLTO], [test "x$have_asciidoc_xmlto" = "xyes"])
+AM_CONDITIONAL([HAVE_CMAKE], [test "x$CMAKE" != "x"])
+AM_CONDITIONAL([HAVE_CXX], [test "$HAVE_CXX11" = "1"])
+AM_CONDITIONAL([HAVE_JAVAH], [test "x$JAVAH" != "x"])
+AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$ac_cv_header_linux_perf_event_h" = "xyes"])
+
+
+##                                             ##
+## Substitute variables for use in Makefile.am ##
+##                                             ##
+
+# Library versions for libtool
+AC_SUBST([LTTNG_UST_LIBRARY_VERSION], ust_lib_version)
+AC_SUBST([LTTNG_UST_CTL_LIBRARY_VERSION], ust_ctl_lib_version)
+
+# Major soname for python-lttngust
+AC_SUBST([LTTNG_UST_LIB_SONAME_MAJOR], [ust_lib_version_current])
+
+AM_CFLAGS="$OPT_CFLAGS $WARN_CFLAGS $URCU_CFLAGS $PTHREAD_CFLAGS"

 AC_SUBST(AM_CFLAGS)
 
 AC_SUBST(AM_CFLAGS)
 

-AM_CXXFLAGS="$AM_CFLAGS"
+AM_CXXFLAGS="$WARN_CXXFLAGS $URCU_CFLAGS $PTHREAD_CFLAGS"

 AC_SUBST(AM_CXXFLAGS)
 
 # The order in which the include folders are searched is important.
 # The top_builddir should always be searched first in the event that a build
 # time generated file is included.
 AC_SUBST(AM_CXXFLAGS)
 
 # The order in which the include folders are searched is important.
 # The top_builddir should always be searched first in the event that a build
 # time generated file is included.

-AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_srcdir)/include -include config.h"
+AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_srcdir)/include -I\$(top_builddir)/src -I\$(top_srcdir)/src -include common/config.h"

 AC_SUBST(AM_CPPFLAGS)
 
 AC_SUBST(JNI_CPPFLAGS)
 AC_SUBST(AM_CPPFLAGS)
 
 AC_SUBST(JNI_CPPFLAGS)


@@ -491,58 +571,71 @@ AC_SUBST(JNI_CPPFLAGS)
 
 # List of files to be generated from '.in' templates by AC_OUTPUT
 AC_CONFIG_FILES([
 
 # List of files to be generated from '.in' templates by AC_OUTPUT
 AC_CONFIG_FILES([

-       Makefile
-       doc/Makefile
-       doc/examples/Makefile
-       doc/man/Makefile
-       include/Makefile
-       snprintf/Makefile
-       libcounter/Makefile
-       libmsgpack/Makefile
-       libringbuffer/Makefile
-       liblttng-ust-comm/Makefile
-       liblttng-ust/Makefile
-       liblttng-ust-ctl/Makefile
-       liblttng-ust-fork/Makefile
-       liblttng-ust-dl/Makefile
-       liblttng-ust-fd/Makefile
-       liblttng-ust-java/Makefile
-       liblttng-ust-java-agent/Makefile
-       liblttng-ust-java-agent/java/Makefile
-       liblttng-ust-java-agent/java/lttng-ust-agent-all/Makefile
-       liblttng-ust-java-agent/java/lttng-ust-agent-common/Makefile
-       liblttng-ust-java-agent/java/lttng-ust-agent-jul/Makefile
-       liblttng-ust-java-agent/java/lttng-ust-agent-log4j/Makefile
-       liblttng-ust-java-agent/jni/Makefile
-       liblttng-ust-java-agent/jni/common/Makefile
-       liblttng-ust-java-agent/jni/jul/Makefile
-       liblttng-ust-java-agent/jni/log4j/Makefile
-       liblttng-ust-libc-wrapper/Makefile
-       liblttng-ust-cyg-profile/Makefile
-       liblttng-ust-python-agent/Makefile
-       python-lttngust/Makefile
-       python-lttngust/setup.py
-       python-lttngust/lttngust/__init__.py
-       tools/Makefile
-       tests/Makefile
-       tests/compile/Makefile
-       tests/compile/ctf-types/Makefile
-       tests/compile/hello.cxx/Makefile
-       tests/compile/hello/Makefile
-       tests/compile/hello-many/Makefile
-       tests/compile/same_line_tracepoint/Makefile
-       tests/compile/test-app-ctx/Makefile
-       tests/benchmark/Makefile
-       tests/unit/gcc-weak-hidden/Makefile
-       tests/unit/libmsgpack/Makefile
-       tests/unit/Makefile
-       tests/unit/libringbuffer/Makefile
-       tests/unit/pthread_name/Makefile
-       tests/unit/snprintf/Makefile
-       tests/unit/ust-elf/Makefile
-       tests/utils/Makefile
-       lttng-ust.pc
-       lttng-ust-ctl.pc
+  Makefile
+  doc/examples/Makefile
+  doc/Makefile
+  doc/man/Makefile
+  extras/Makefile
+  include/Makefile
+  src/common/Makefile
+  src/lib/lttng-ust-common/Makefile
+  src/lib/lttng-ust-ctl/Makefile
+  src/lib/lttng-ust-cyg-profile/Makefile
+  src/lib/lttng-ust-dl/Makefile
+  src/lib/lttng-ust-fd/Makefile
+  src/lib/lttng-ust-fork/Makefile
+  src/lib/lttng-ust-java-agent/java/lttng-ust-agent-all/Makefile
+  src/lib/lttng-ust-java-agent/java/lttng-ust-agent-common/Makefile
+  src/lib/lttng-ust-java-agent/java/lttng-ust-agent-jul/Makefile
+  src/lib/lttng-ust-java-agent/java/lttng-ust-agent-log4j/Makefile
+  src/lib/lttng-ust-java-agent/java/Makefile
+  src/lib/lttng-ust-java-agent/jni/common/Makefile
+  src/lib/lttng-ust-java-agent/jni/jul/Makefile
+  src/lib/lttng-ust-java-agent/jni/log4j/Makefile
+  src/lib/lttng-ust-java-agent/jni/Makefile
+  src/lib/lttng-ust-java-agent/Makefile
+  src/lib/lttng-ust-java/Makefile
+  src/lib/lttng-ust-libc-wrapper/Makefile
+  src/lib/lttng-ust-pthread-wrapper/Makefile
+  src/lib/lttng-ust-tracepoint/Makefile
+  src/lib/lttng-ust/Makefile
+  src/lib/lttng-ust-python-agent/Makefile
+  src/lib/Makefile
+  src/lib/lttng-ust-ctl.pc
+  src/lib/lttng-ust.pc
+  src/Makefile
+  src/python-lttngust/lttngust/version.py
+  src/python-lttngust/Makefile
+  src/python-lttngust/setup.py
+  tests/benchmark/Makefile
+  tests/compile/api0/ctf-types/Makefile
+  tests/compile/api0/hello.cxx/Makefile
+  tests/compile/api0/hello/Makefile
+  tests/compile/api0/hello-many/Makefile
+  tests/compile/api0/Makefile
+  tests/compile/api0/same_line_tracepoint/Makefile
+  tests/compile/api1/ust-fields/Makefile
+  tests/compile/api1/hello.cxx/Makefile
+  tests/compile/api1/hello/Makefile
+  tests/compile/api1/hello-many/Makefile
+  tests/compile/api1/Makefile
+  tests/compile/api1/same_line_tracepoint/Makefile
+  tests/compile/api1/test-app-ctx/Makefile
+  tests/compile/Makefile
+  tests/Makefile
+  tests/regression/abi0-conflict/Makefile
+  tests/regression/Makefile
+  tests/unit/gcc-weak-hidden/Makefile
+  tests/unit/libmsgpack/Makefile
+  tests/unit/libringbuffer/Makefile
+  tests/unit/Makefile
+  tests/unit/pthread_name/Makefile
+  tests/unit/snprintf/Makefile
+  tests/unit/ust-elf/Makefile
+  tests/unit/ust-error/Makefile
+  tests/unit/ust-utils/Makefile
+  tests/utils/Makefile
+  tools/Makefile

 ])
 
 AC_OUTPUT
 ])
 
 AC_OUTPUT


@@ -567,9 +660,9 @@ AS_ECHO
 
 AS_IF([test -n "ust_version_description"], [
   AS_IF([test -n "$FOLD"], [
 
 AS_IF([test -n "ust_version_description"], [
   AS_IF([test -n "$FOLD"], [

-    AS_ECHO("`AS_ECHO("ust_version_description") | $FOLD -s`")
+    AS_ECHO(["ust_version_description"]) | $FOLD -s

   ], [
   ], [

-    AS_ECHO("ust_version_description")
+    AS_ECHO(["ust_version_description"])

   ])
   AS_ECHO
 ])
   ])
   AS_ECHO
 ])


@@ -578,7 +671,7 @@ PPRINT_SUBTITLE([System])
 
 PPRINT_PROP_STRING([Target architecture], $host_cpu)
 
 
 PPRINT_PROP_STRING([Target architecture], $host_cpu)
 

-AS_IF([test "x$UNSUPPORTED_ARCH" = "x1"],[
+AS_IF([test "x$unsupported_arch" = "xyes"],[

        PPRINT_WARN([Your architecture ($host_cpu) is unsupported, using safe default of no unaligned access.])
 ])
 
        PPRINT_WARN([Your architecture ($host_cpu) is unsupported, using safe default of no unaligned access.])
 ])
 


@@ -589,47 +682,47 @@ PPRINT_SET_INDENT(1)
 test "x$with_sdt" = "xyes" && value=1 || value=0
 PPRINT_PROP_BOOL_CUSTOM([sdt.h integration], $value, [use --with-sdt])
 
 test "x$with_sdt" = "xyes" && value=1 || value=0
 PPRINT_PROP_BOOL_CUSTOM([sdt.h integration], $value, [use --with-sdt])
 

-test "x$java_agent_jul" = xyes && value=1 || value=0
+AE_IS_FEATURE_ENABLED([java-agent-jul]) && value=1 || value=0

 PPRINT_PROP_BOOL_CUSTOM([Java agent (JUL support)], $value, [use --enable-java-agent-jul])
 
 PPRINT_PROP_BOOL_CUSTOM([Java agent (JUL support)], $value, [use --enable-java-agent-jul])
 

-test "x$java_agent_log4j" = xyes && value=1 || value=0
+AE_IS_FEATURE_ENABLED([java-agent-log4j]) && value=1 || value=0

 PPRINT_PROP_BOOL_CUSTOM([Java agent (Log4j support)], $value, [use --enable-java-agent-log4j])
 
 PPRINT_PROP_BOOL_CUSTOM([Java agent (Log4j support)], $value, [use --enable-java-agent-log4j])
 

-test "x$jni_interface" = xyes && value=1 || value=0
+AE_IS_FEATURE_ENABLED([jni-interface]) && value=1 || value=0

 PPRINT_PROP_BOOL_CUSTOM([JNI interface (JNI)], $value, [use --enable-jni-interface])
 
 PPRINT_PROP_BOOL_CUSTOM([JNI interface (JNI)], $value, [use --enable-jni-interface])
 

-test "x$python_agent" = xyes && value=1 || value=0
+AE_IS_FEATURE_ENABLED([python-agent]) && value=1 || value=0

 PPRINT_PROP_BOOL_CUSTOM([Python agent], $value, [use --enable-python-agent])
 
 test "x$ac_cv_header_linux_perf_event_h" = "xyes" && value=1 || value=0
 PPRINT_PROP_BOOL_CUSTOM([Perf event integration], $value)
 
 PPRINT_PROP_BOOL_CUSTOM([Python agent], $value, [use --enable-python-agent])
 
 test "x$ac_cv_header_linux_perf_event_h" = "xyes" && value=1 || value=0
 PPRINT_PROP_BOOL_CUSTOM([Perf event integration], $value)
 

-test "x$enable_numa" = xyes && value=1 || value=0
+AE_IS_FEATURE_ENABLED([numa]) && value=1 || value=0

 PPRINT_PROP_BOOL([NUMA], $value)
 
 AS_ECHO
 PPRINT_SET_INDENT(0)
 
 PPRINT_PROP_BOOL([NUMA], $value)
 
 AS_ECHO
 PPRINT_SET_INDENT(0)
 

-test "x$enable_examples" = xyes && value=1 || value=0
+AE_IS_FEATURE_ENABLED([examples]) && value=1 || value=0

 PPRINT_PROP_BOOL([Build and install examples], $value, $PPRINT_COLOR_SUBTITLE)
 
 # man pages build enabled/disabled
 m4_pushdef([build_man_pages_msg], [Build and install man pages])
 
 PPRINT_PROP_BOOL([Build and install examples], $value, $PPRINT_COLOR_SUBTITLE)
 
 # man pages build enabled/disabled
 m4_pushdef([build_man_pages_msg], [Build and install man pages])
 

-AS_IF([test "x$man_pages_opt" != "xno"], [
-       AE_IF_IN_GIT_REPO([
-               PPRINT_PROP_BOOL([build_man_pages_msg], 1, $PPRINT_COLOR_SUBTITLE)
-       ], [
-               AS_IF([test "x$have_asciidoc_xmlto" = "xyes"], [
-                       PPRINT_PROP_BOOL([build_man_pages_msg], 1, $PPRINT_COLOR_SUBTITLE)
-               ], [
-                       PPRINT_PROP_STRING([build_man_pages_msg],
-                               [${PPRINT_COLOR_BLDGRN}yes (already built)],
-                               $PPRINT_COLOR_SUBTITLE)
-               ])
-       ])
+AE_IF_FEATURE_ENABLED([man-pages], [
+  AE_IF_IN_GIT_REPO([
+    PPRINT_PROP_BOOL([build_man_pages_msg], 1, $PPRINT_COLOR_SUBTITLE)
+  ], [
+    AS_IF([test "x$have_asciidoc_xmlto" = "xyes"], [
+      PPRINT_PROP_BOOL([build_man_pages_msg], 1, $PPRINT_COLOR_SUBTITLE)
+    ], [
+      PPRINT_PROP_STRING([build_man_pages_msg],
+        [${PPRINT_COLOR_BLDGRN}yes (already built)],
+        $PPRINT_COLOR_SUBTITLE)
+    ])
+  ])

 ], [
 ], [

-       PPRINT_PROP_BOOL([build_man_pages_msg], 0, $PPRINT_COLOR_SUBTITLE)
+  PPRINT_PROP_BOOL([build_man_pages_msg], 0, $PPRINT_COLOR_SUBTITLE)

 ])
 
 m4_popdef([build_man_pages_msg])
 ])
 
 m4_popdef([build_man_pages_msg])


@@ -653,8 +746,9 @@ PPRINT_PROP_STRING([lttng-sessiond rundir], [$lttng_system_rundir])
 PPRINT_SET_INDENT(0)
 
 AS_IF([test "x$warn_prebuilt_man_pages" = "xyes" ], [
 PPRINT_SET_INDENT(0)
 
 AS_IF([test "x$warn_prebuilt_man_pages" = "xyes" ], [

-       AS_ECHO
-       PPRINT_WARN([Both asciidoc and xmlto are needed to build the LTTng-UST man pages.
+  AS_ECHO
+  PPRINT_WARN([dnl
+Both asciidoc and xmlto are needed to build the LTTng-UST man pages.

 
 Note that the man pages are already built in this distribution tarball,
 therefore asciidoc and xmlto are only needed if you intend to modify
 
 Note that the man pages are already built in this distribution tarball,
 therefore asciidoc and xmlto are only needed if you intend to modify


@@ -663,3 +757,5 @@ their sources.
 Use --disable-man-pages to completely disable building and installing
 the man pages.])
 ])
 Use --disable-man-pages to completely disable building and installing
 the man pages.])
 ])

+
+# vim: shiftwidth=2 softtabstop=2 expandtab