From: Gilles Espinasse <g.esp@free.fr>
Date: Tue, 29 Mar 2011 14:30:11 +0000 (+0100)
Subject: [build] Fix compilation when gcc is patched to default to -fPIE -Wl,-pie
X-Git-Tag: v1.20.1~2177
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe61f6d;p=thirdparty%2Fipxe.git

[build] Fix compilation when gcc is patched to default to -fPIE -Wl,-pie

Signed-off-by: Gilles Espinasse <g.esp@free.fr>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
---

diff --git a/src/Makefile.housekeeping b/src/Makefile.housekeeping
index 57e52c0f8..c184351d5 100644
--- a/src/Makefile.housekeeping
+++ b/src/Makefile.housekeeping
@@ -138,6 +138,17 @@ SP_FLAGS := $(shell $(SP_TEST) && $(ECHO) '-fno-stack-protector')
 WORKAROUND_CFLAGS += $(SP_FLAGS)
 endif
 
+# Some widespread patched versions of gcc include -fPIE -Wl,-pie by
+# default.  Note that gcc will exit *successfully* if it fails to
+# recognise an option that starts with "no", so we have to test for
+# output on stderr instead of checking the exit status.
+#
+ifeq ($(CCTYPE),gcc)
+PIE_TEST = [ -z "`$(CC) -fno-PIE -nopie -x c -c /dev/null -o /dev/null 2>&1`" ]
+PIE_FLAGS := $(shell $(PIE_TEST) && $(ECHO) '-fno-PIE -nopie')
+WORKAROUND_CFLAGS += $(PIE_FLAGS)
+endif
+
 # gcc 4.4 generates .eh_frame sections by default, which distort the
 # output of "size".  Inhibit this.
 #