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authorH.J. Lu <hjl.tools@gmail.com>2017-12-18 12:24:26 -0800
committerH.J. Lu <hjl.tools@gmail.com>2017-12-18 12:24:38 -0800
commit00c714df398b63934540d95ce3792596f7a94a6c (patch)
treef96ed5735a44f5a6afff6efafe5dc86f1b93fecb /configure
parent8e1472d2c1e25e6eabc2059170731365f6d5b3d1 (diff)
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Pass -no-pie to GCC only if GCC defaults to PIE [BZ #22614]
After --enable-static-pie is added to configure, libc_cv_pie_default is
set to yes when either --enable-static-pie is used to configure glibc
or GCC defaults to PIE.  We should set no-pie-ldflag to -no-pie, which
is supported on GCC 6 and later, only if GCC defaults to PIE, not when
--enable-static-pie is used to configure glibc.

Tested on x32 with --enable-static-pie using GCC 5 and without
--enable-static-pie using GCC 7.

	[BZ #22614]
	* Makeconfig (no-pie-ldflag): Set to -no-pie only if
	$(cc-pie-default) == yes.
	* config.make.in (cc-pie-default): New.
	* configure.ac (libc_cv_pie_default): Renamed to ...
	(libc_cv_cc_pie_default): This.
	(libc_cv_pie_default): Set to $libc_cv_cc_pie_default.
	* configure: Regenerated.
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure13
1 files changed, 8 insertions, 5 deletions
diff --git a/configure b/configure
index 9da9fb2736..7a8bd3f817 100755
--- a/configure
+++ b/configure
@@ -596,6 +596,7 @@ static_nss
 profile
 libc_cv_multidir
 libc_cv_pie_default
+libc_cv_cc_pie_default
 libc_cv_pic_default
 shared
 static
@@ -6748,22 +6749,24 @@ $as_echo "$libc_cv_pic_default" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIE is default" >&5
 $as_echo_n "checking whether -fPIE is default... " >&6; }
-if ${libc_cv_pie_default+:} false; then :
+if ${libc_cv_cc_pie_default+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  libc_cv_pie_default=yes
+  libc_cv_cc_pie_default=yes
 cat > conftest.c <<EOF
 #if defined __PIE__ || defined __pie__ || defined PIE || defined pie
 # error PIE is default.
 #endif
 EOF
 if eval "${CC-cc} -S conftest.c 2>&5 1>&5"; then
-  libc_cv_pie_default=no
+  libc_cv_cc_pie_default=no
 fi
 rm -f conftest.*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_pie_default" >&5
-$as_echo "$libc_cv_pie_default" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_pie_default" >&5
+$as_echo "$libc_cv_cc_pie_default" >&6; }
+libc_cv_pie_default=$libc_cv_cc_pie_default
+
 
 
 # Set the `multidir' variable by grabbing the variable from the compiler.