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Pass -no-pie to GCC only if GCC defaults to PIE [BZ #22614]

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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.
This commit is contained in:
H.J. Lu 2017-12-18 12:24:26 -08:00
parent 8e1472d2c1
commit 00c714df39
5 changed files with 28 additions and 9 deletions
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11
ChangeLog
View File

@ -1,3 +1,14 @@
2017-12-18 H.J. Lu <hongjiu.lu@intel.com>
[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.
2017-12-18 Florian Weimer <fweimer@redhat.com>
[BZ #20204]

4
Makeconfig
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@ -464,8 +464,10 @@ endif
# Commands for linking programs with the C library.
ifndef +link
ifeq (yes,$(build-shared))
ifeq (yes,$(build-pie-default))
ifeq (yes,$(cc-pie-default))
no-pie-ldflag = -no-pie
endif
ifeq (yes,$(build-pie-default))
+link = $(+link-pie)
+link-tests = $(+link-pie-tests)
+link-printers-tests = $(+link-pie-printers-tests)

1
config.make.in
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@ -89,6 +89,7 @@ static-nss-crypt = @libc_cv_static_nss_crypt@
build-shared = @shared@
build-pic-default= @libc_cv_pic_default@
build-pie-default= @libc_cv_pie_default@
cc-pie-default= @libc_cv_cc_pie_default@
build-profile = @profile@
build-static-nss = @static_nss@
cross-compiling = @cross_compiling@

13
configure vendored
View File

@ -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.

8
configure.ac
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@ -1794,17 +1794,19 @@ fi
rm -f conftest.*])
AC_SUBST(libc_cv_pic_default)
AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default,
[libc_cv_pie_default=yes
AC_CACHE_CHECK([whether -fPIE is default], libc_cv_cc_pie_default,
[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 "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
libc_cv_pie_default=no
libc_cv_cc_pie_default=no
fi
rm -f conftest.*])
libc_cv_pie_default=$libc_cv_cc_pie_default
AC_SUBST(libc_cv_cc_pie_default)
AC_SUBST(libc_cv_pie_default)
# Set the `multidir' variable by grabbing the variable from the compiler.