Don't use hidden visibility in libc.a with PIE on i386

[thirdparty/glibc.git] / sysdeps / i386 / configure.ac

diff --git a/sysdeps/i386/configure.ac b/sysdeps/i386/configure.ac
index a3f3067fb7571280fb2b78493ce9fd179d102b88..b598b120bcd734b11e651e17f8718e05046238d9 100644 (file)
--- a/sysdeps/i386/configure.ac
+++ b/sysdeps/i386/configure.ac
@@ -30,64 +30,6 @@ LIBC_COMPILER_BUILTIN_INLINED(
 *** Please use host i786, i686, i586, or i486.
 *** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ...])])
 
-AC_CHECK_HEADER([cpuid.h], ,
-  [AC_MSG_ERROR([gcc must provide the <cpuid.h> header])],
-  [/* No default includes.  */])
-
-dnl Check if -msse4 works.
-AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
-LIBC_TRY_CC_OPTION([-msse4], [libc_cv_cc_sse4=yes], [libc_cv_cc_sse4=no])
-])
-if test $libc_cv_cc_sse4 = yes; then
-  AC_DEFINE(HAVE_SSE4_SUPPORT)
-fi
-LIBC_CONFIG_VAR([config-cflags-sse4], [$libc_cv_cc_sse4])
-
-dnl Check if -Wa,-mtune=i686 works.
-AC_CACHE_CHECK(for assembler -mtune=i686 support, libc_cv_as_i686, [dnl
-LIBC_TRY_CC_OPTION([-Wa,-mtune=i686],
-                  [libc_cv_as_i686=yes],
-                  [libc_cv_as_i686=no])
-])
-LIBC_CONFIG_VAR([config-asflags-i686], [$libc_cv_as_i686])
-
-dnl Check if -mavx works.
-AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
-LIBC_TRY_CC_OPTION([-mavx], [libc_cv_cc_avx=yes], [libc_cv_cc_avx=no])
-])
-if test $libc_cv_cc_avx = yes; then
-  AC_DEFINE(HAVE_AVX_SUPPORT)
-fi
-LIBC_CONFIG_VAR([config-cflags-avx], [$libc_cv_cc_avx])
-
-dnl Check if -msse2avx works.
-AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
-LIBC_TRY_CC_OPTION([-msse2avx],
-                  [libc_cv_cc_sse2avx=yes],
-                  [libc_cv_cc_sse2avx=no])
-])
-if test $libc_cv_cc_sse2avx = yes; then
-  AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
-fi
-LIBC_CONFIG_VAR([config-cflags-sse2avx], [$libc_cv_cc_sse2avx])
-
-dnl Check if -mfma4 works.
-AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
-LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no])
-])
-if test $libc_cv_cc_fma4 = yes; then
-  AC_DEFINE(HAVE_FMA4_SUPPORT)
-fi
-LIBC_CONFIG_VAR([have-mfma4], [$libc_cv_cc_fma4])
-
-dnl Check if -mno-vzeroupper works.
-AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
-LIBC_TRY_CC_OPTION([-mno-vzeroupper],
-                  [libc_cv_cc_novzeroupper=yes],
-                  [libc_cv_cc_novzeroupper=no])
-])
-LIBC_CONFIG_VAR([config-cflags-novzeroupper], [$libc_cv_cc_novzeroupper])
-
 dnl Check whether asm supports Intel MPX
 AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl
 cat > conftest.s <<\EOF
@@ -99,21 +41,16 @@ else
   libc_cv_asm_mpx=no
 fi
 rm -f conftest*])
-if test $libc_cv_asm_mpx == yes; then
+if test $libc_cv_asm_mpx = yes; then
   AC_DEFINE(HAVE_MPX_SUPPORT)
 fi
 
-dnl Check if -mavx2 works.
-AC_CACHE_CHECK(for AVX2 support, libc_cv_cc_avx2, [dnl
-LIBC_TRY_CC_OPTION([-mavx2], [libc_cv_cc_avx2=yes], [libc_cv_cc_avx2=no])
-])
-if test $libc_cv_cc_avx2 = yes; then
-  AC_DEFINE(HAVE_AVX2_SUPPORT)
-fi
-LIBC_CONFIG_VAR([config-cflags-avx2], [$libc_cv_cc_avx2])
-
-AC_DEFINE(USE_REGPARMS)
-
 dnl It is always possible to access static and hidden symbols in an
 dnl position independent way.
 AC_DEFINE(PI_STATIC_AND_HIDDEN)
+
+dnl When multi-arch is enabled, all external functions must be called
+dnl via PIC PLT in PIE, which requires setting up EBX register.
+if test x"$multi_arch" != xno; then
+  AC_DEFINE(NO_HIDDEN_EXTERN_FUNC_IN_PIE)
+fi