diff options
Diffstat (limited to 'sysdeps/i386/configure.ac')
| -rw-r--r-- | sysdeps/i386/configure.ac | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sysdeps/i386/configure.ac b/sysdeps/i386/configure.ac index b598b120bc..6d2068d2b3 100644 --- a/sysdeps/i386/configure.ac +++ b/sysdeps/i386/configure.ac @@ -30,6 +30,29 @@ LIBC_COMPILER_BUILTIN_INLINED( *** Please use host i786, i686, i586, or i486. *** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ...])]) +dnl Check if linker can convert "movl main@GOT(%ebx), %eax" to +dnl "leal main@GOTOFF(%ebx), %eax" for static PIE. +if test "$static_pie" = yes; then + AC_CACHE_CHECK(for linker static PIE support, libc_cv_ld_static_pie, [dnl +cat > conftest.s <<\EOF + .text + .global _start +_start: + movl _start@GOT(%ebx), %eax +EOF + libc_cv_pie_option="-Wl,-pie" + libc_cv_ld_static_pie=no + if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp $libc_cv_pie_option -o conftest conftest.s 1>&AS_MESSAGE_LOG_FD); then + if $READELF -r conftest | grep 'There are no relocations in this file.' > /dev/null; then + libc_cv_ld_static_pie=yes + fi + fi +rm -f conftest*]) + if test "$libc_cv_ld_static_pie" != yes; then + AC_MSG_ERROR([linker support for static PIE needed]) + fi +fi + dnl Check whether asm supports Intel MPX AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl cat > conftest.s <<\EOF |