Change the way module initialisation is done (#3252, #4417)

[ghc-hetmet.git] / aclocal.m4

diff --git a/aclocal.m4 b/aclocal.m4
index 23e6bc0..e09bda8 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -484,6 +484,31 @@ AC_SUBST([LdXFlag])
 ])# FP_PROG_LD_X
 
 
+# FP_PROG_LD_BUILD_ID
+# ------------
+
+# Sets the output variable LdHasBuildId to YES if ld supports
+# --build-id, or NO otherwise.
+AC_DEFUN([FP_PROG_LD_BUILD_ID],
+[
+AC_CACHE_CHECK([whether ld understands --build-id], [fp_cv_ld_build_id],
+[echo 'foo() {}' > conftest.c
+${CC-cc} -c conftest.c
+if ${LdCmd} -r --build-id=none -o conftest2.o conftest.o > /dev/null 2>&1; then
+   fp_cv_ld_build_id=yes
+else
+   fp_cv_ld_build_id=no
+fi
+rm -rf conftest*])
+if test "$fp_cv_ld_build_id" = yes; then
+  LdHasBuildId=YES
+else
+  LdHasBuildId=NO
+fi
+AC_SUBST([LdHasBuildId])
+])# FP_PROG_LD_BUILD_ID
+
+
 # FP_PROG_LD_IS_GNU
 # -----------------
 # Sets the output variable LdIsGNULd to YES or NO, depending on whether it is