X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=configure.ac;h=c0656f4fb3362b70bacc057857922526f6c59903;hb=0ba696e20c94ef26275ffc0cfb3e54429d36e806;hp=bb196f541493a2a5bb0b3dd43996b7f627f054d4;hpb=6aad7f2cd75c88f990c7857bb173b3e8d0faee0f;p=elogind.git

diff --git a/configure.ac b/configure.ac
index bb196f541..c0656f4fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -156,6 +156,10 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -fdata-sections \
         -fstack-protector \
         --param=ssp-buffer-size=4])
+AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
+        [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
+               -flto])],
+        [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
 AC_SUBST([OUR_CFLAGS], "$with_cflags $address_sanitizer_cflags")
 
 AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
@@ -838,7 +842,7 @@ AC_DEFINE_UNQUOTED(TELINIT, ["$TELINIT"], [Path to telinit])
 
 AC_SUBST(TELINIT)
 
-AC_CHECK_HEADERS_ONCE([valgrind/memcheck.h])
+AC_CHECK_HEADERS_ONCE([valgrind/memcheck.h valgrind/valgrind.h])
 
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 have_myhostname=no