From 13c56943b6a7730079680df95f8d04be2f6bb53a Mon Sep 17 00:00:00 2001
From: Richard Hughes <richard@hughsie.com>
Date: Tue, 24 Jul 2007 12:31:01 +0000
Subject: 2007-07-24  Richard Hughes  <richard@hughsie.com>

* configure.in:
Check for -Wl,--gc-sections so we can really reduce the size of the
setuid binary.
---
 configure.in | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index 877bc0a7..cf0d8ecf 100644
--- a/configure.in
+++ b/configure.in
@@ -243,6 +243,32 @@ else
   fi
 fi
 
+# Check for -Wl,--gc-sections
+AC_MSG_CHECKING([for ld that supports "-Wl,--gc-sections"])
+AC_TRY_LINK([
+  int one(void) { return 1; }
+  int two(void) { return 2; }
+  ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
+
+if test "$ac_gcsections" = "yes"; then
+  rm -f conftest.c
+  touch conftest.c
+  if $CC -c conftest.c; then
+    if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+      grep "Warning: gc-sections option ignored" > /dev/null; then
+      ac_gcsections=no
+    fi
+  fi
+  rm -f conftest.c conftest.o conftest
+fi
+if test "$ac_gcsections" = "yes"; then
+  SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
+  CFLAGS="-ffunction-sections -fdata-sections $CFLAGS"
+fi
+AC_SUBST(SECTION_FLAGS)
+AC_SUBST(SECTION_LDFLAGS)
+AC_MSG_RESULT($ac_gcsections)
+
 # Add -D_POSIX_PTHREAD_SEMANTICS if on Solaris
 #
 case $target_os in
-- 
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