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GNU C Library master sources branch hjl/pr17711 updated. glibc-2.20-542-ga3ee42d
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 14 Jan 2015 14:31:09 -0000
- Subject: GNU C Library master sources branch hjl/pr17711 updated. glibc-2.20-542-ga3ee42d
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a3ee42d98ba38bc6e88acdc5a03fc955e02e5965
commit a3ee42d98ba38bc6e88acdc5a03fc955e02e5965
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Wed Jan 14 06:29:04 2015 -0800
Support compilers defaulting to PIE
If PIE is the default, we need to build programs as PIE.
* Makeconfig (+link): Set to $(+link-pie) if default to PIE.
(+link-tests): Set to $(+link-pie-tests) if default to PIE.
* config.make.in (build-pie-default): New.
* configure.ac (libc_cv_pie_default): New. Set to yes if -fPIE
is default. AC_SUBST.
* configure: Regenerated.
diff --git a/Makeconfig b/Makeconfig
index 751e9ff..9bd0db3 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -425,6 +425,10 @@ endif
# Commands for linking programs with the C library.
ifndef +link
ifeq (yes,$(build-shared))
+ifeq (yes,$(build-pie-default))
++link = $(+link-pie)
++link-tests = $(+link-pie-tests)
+else
+link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
@@ -440,6 +444,7 @@ ifeq (yes,$(build-shared))
$(+link-after-libc)
+link-tests = $(+link-before-libc) $(rtld-tests-LDFLAGS) \
$(link-libc-tests) $(+link-after-libc)
+endif
else
+link = $(+link-static)
+link-tests = $(+link-static-tests)
diff --git a/config.make.in b/config.make.in
index ad4dd30..635932f 100644
--- a/config.make.in
+++ b/config.make.in
@@ -81,6 +81,7 @@ nss-crypt = @libc_cv_nss_crypt@
# Configuration options.
build-shared = @shared@
build-pic-default= @libc_cv_pic_default@
+build-pie-default= @libc_cv_pie_default@
build-profile = @profile@
build-static-nss = @static_nss@
add-ons = @add_ons@
diff --git a/configure b/configure
index ce0c6a0..3f5d207 100755
--- a/configure
+++ b/configure
@@ -596,6 +596,7 @@ mach_interface_list
DEFINES
static_nss
profile
+libc_cv_pie_default
libc_cv_pic_default
shared
static
@@ -7157,6 +7158,26 @@ fi
$as_echo "$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 :
+ $as_echo_n "(cached) " >&6
+else
+ libc_cv_pie_default=yes
+cat > conftest.c <<EOF
+#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
+# error PIE is default.
+#endif
+EOF
+if eval "${CC-cc} -S conftest.c 2>&5 1>&5"; then
+ libc_cv_pie_default=no
+fi
+rm -f conftest.*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_pie_default" >&5
+$as_echo "$libc_cv_pie_default" >&6; }
+
+
diff --git a/configure.ac b/configure.ac
index d89aaf0..cb37a83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2019,6 +2019,19 @@ fi
rm -f conftest.*])
AC_SUBST(libc_cv_pic_default)
+AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default,
+[libc_cv_pie_default=yes
+cat > conftest.c <<EOF
+#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
+# error PIE is default.
+#endif
+EOF
+if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
+ libc_cv_pie_default=no
+fi
+rm -f conftest.*])
+AC_SUBST(libc_cv_pie_default)
+
AC_SUBST(profile)
AC_SUBST(static_nss)
-----------------------------------------------------------------------
Summary of changes:
Makeconfig | 5 +++++
config.make.in | 1 +
configure | 21 +++++++++++++++++++++
configure.ac | 13 +++++++++++++
4 files changed, 40 insertions(+), 0 deletions(-)
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