Validate the presence of dlmopen at configure time

[lttng-ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 450b43b23ce6af31047fde462918878dc91423c7..023cfd4e3811ac52b020bec794a948d2bbf681e3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -125,15 +125,23 @@ AS_IF([test "x${ax_cv_sys_weak_alias}" = "xno"], [
 # Checks for libraries.
 AC_CHECK_LIB([dl], [dlopen], [
        have_libdl=yes
+       libdl_name=dl
 ], [
        #libdl not found, check for dlopen in libc.
        AC_CHECK_LIB([c], [dlopen], [
                have_libc_dl=yes
+               libdl_name=c
        ], [
                AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
        ])
 ])
 
+# Check if libdl has dlmopen support.
+AH_TEMPLATE([HAVE_DLMOPEN], ["Define to 1 if dlmopen is available."])
+AC_CHECK_LIB([$libdl_name], [dlmopen],
+       [AC_DEFINE([HAVE_DLMOPEN], [1])]
+)
+
 AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBDL], [test "x$have_libdl" = "xyes"])
 AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBC_DL], [test "x$have_libc_dl" = "xyes"])