Cygwin: Remove weak symbols attributes due to semantic differences

[lttng-ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 511da2e95c8b672efb593824cd684cb139030664..73c7b897e522e169437437bba582ffe90e2f6ca7 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -169,6 +169,10 @@ got it
                     [ust_cv_i386_is_x86_64=no])
                     CPPFLAGS="$save_CPPFLAGS"])
     ;;
+    # All symbols must be resolved at link time on Cygwin/MinGW/Windows,
+    # else libtool will not be able to build shared libraries.
+    *-*-cygwin*)
+    LDFLAGS="-Wl,-no-undefined $LDFLAGS";;
 esac
 
 AC_MSG_CHECKING([library format for the host system])
@@ -277,6 +281,13 @@ AS_IF([test "x$with_sdt" = "xyes"],[
 
 #      liblttng-ust-java/Makefile
 
+# Disabled for now, because these libraries
+# rely on the dlsym(3) RTLD_NEXT GNU extension.
+# This is not implemented in Cygwin.
+#liblttng-ust-fork/Makefile
+#liblttng-ust-libc-wrapper/Makefile
+#tests/fork/Makefile
+
 AC_CONFIG_FILES([
        Makefile
        doc/Makefile
@@ -288,15 +299,12 @@ AC_CONFIG_FILES([
        liblttng-ust-comm/Makefile
        liblttng-ust/Makefile
        liblttng-ust-ctl/Makefile
-       liblttng-ust-fork/Makefile
-       liblttng-ust-libc-wrapper/Makefile
        tools/Makefile
        tests/Makefile
        tests/hello/Makefile
        tests/hello-static-lib/Makefile
        tests/hello.cxx/Makefile
        tests/demo/Makefile
-       tests/fork/Makefile
        tests/ust-basic-tracing/Makefile
        tests/ust-multi-test/Makefile
        lttng-ust.pc