From 340f77635d76ea6800caeca2d71f0432fea0d31a Mon Sep 17 00:00:00 2001 From: Samuel Martin Date: Sun, 13 Jan 2013 11:40:10 -0500 Subject: [PATCH] Fix: don't build C++ example if a C++ compiler isn't available By default lttng-ust builds a hello.cxx C++ example that demonstrates the usage of the userspace tracing library in a C++ program. Unfortunately, when no C++ support is available, the build of lttng-ust fails just because of this example code. So we make the compilation of this code conditional on whether a working C++ compiler was found. Signed-off-by: Thomas Petazzoni Signed-off-by: Samuel Martin Signed-off-by: Mathieu Desnoyers --- configure.ac | 12 ++++++++++++ tests/Makefile.am | 6 +++++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index a67e8f97..0749ce7e 100644 --- a/configure.ac +++ b/configure.ac @@ -77,6 +77,18 @@ AC_PROG_CXX AC_PROG_MAKE_SET LT_INIT +# rw_PROG_CXX_WORKS +# Check whether the C++ compiler works. +AC_CACHE_CHECK([whether the C++ compiler works], + [rw_cv_prog_cxx_works], + [AC_LANG_PUSH([C++]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], + [rw_cv_prog_cxx_works=yes], + [rw_cv_prog_cxx_works=no]) + AC_LANG_POP([C++])]) + +AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"]) + ## Checks for libraries. AC_CHECK_LIB([dl], [dlopen], [ diff --git a/tests/Makefile.am b/tests/Makefile.am index 2b124228..7365ce47 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -1,7 +1,11 @@ SUBDIRS = . hello hello-static-lib fork ust-basic-tracing ust-multi-test \ - demo hello.cxx daemon + demo daemon #SUBDIRS = . hello2 basic basic_long simple_include snprintf test-nevents test-libustinstr-malloc dlopen same_line_marker trace_event register_test tracepoint libustctl_function_tests exit-fast +if CXX_WORKS +SUBDIRS += hello.cxx +endif + dist_noinst_SCRIPTS = test_loop runtests trace_matches noinst_LIBRARIES = libtap.a -- 2.34.1