diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 114 |
1 files changed, 109 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 0ca9ae24..d6108cde 100644 --- a/configure.ac +++ b/configure.ac @@ -1,7 +1,7 @@ dnl Process this file with autoconf to produce a configure script. dnl Configure input file for elfutils. -*-autoconf-*- dnl -dnl Copyright (C) 1996-2017 Red Hat, Inc. +dnl Copyright (C) 1996-2018 Red Hat, Inc. dnl dnl This file is part of elfutils. dnl @@ -17,7 +17,7 @@ dnl GNU General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program. If not, see <http://www.gnu.org/licenses/>. -AC_INIT([elfutils],[0.170],[https://sourceware.org/bugzilla],[elfutils],[http://elfutils.org/]) +AC_INIT([elfutils],[0.173],[https://sourceware.org/bugzilla],[elfutils],[http://elfutils.org/]) dnl Workaround for older autoconf < 2.64 m4_ifndef([AC_PACKAGE_URL], @@ -47,7 +47,7 @@ fi AC_CONFIG_AUX_DIR([config]) AC_CONFIG_FILES([config/Makefile]) -AC_COPYRIGHT([Copyright (C) 1996-2017 The elfutils developers.]) +AC_COPYRIGHT([Copyright (C) 1996-2018 The elfutils developers.]) AC_PREREQ(2.63) dnl Minimum Autoconf version required. dnl We use GNU make extensions; automake 1.10 defaults to -Wportability. @@ -133,13 +133,94 @@ CFLAGS="$old_CFLAGS"]) AS_IF([test "x$ac_cv_c99" != xyes], AC_MSG_ERROR([gcc with GNU99 support required])) +AC_CACHE_CHECK([whether gcc supports __attribute__((visibility()))], + ac_cv_visibility, [dnl +save_CFLAGS="$CFLAGS" +CFLAGS="$save_CFLAGS -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl +int __attribute__((visibility("hidden"))) +foo (int a) +{ + return a; +}])], ac_cv_visibility=yes, ac_cv_visibility=no) +CFLAGS="$save_CFLAGS"]) +if test "$ac_cv_visibility" = "yes"; then + AC_DEFINE([HAVE_VISIBILITY], [1], + [Defined if __attribute__((visibility())) is supported]) +fi + +AC_CACHE_CHECK([whether gcc supports __attribute__((gcc_struct))], + ac_cv_gcc_struct, [dnl +save_CFLAGS="$CFLAGS" +CFLAGS="$save_CFLAGS -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl +struct test { int x; } __attribute__((gcc_struct)); +])], ac_cv_gcc_struct=yes, ac_cv_gcc_struct=no) +CFLAGS="$save_CFLAGS"]) +if test "$ac_cv_gcc_struct" = "yes"; then + AC_DEFINE([HAVE_GCC_STRUCT], [1], + [Defined if __attribute__((gcc_struct)) is supported]) +fi + +AC_CACHE_CHECK([whether gcc supports -fPIC], ac_cv_fpic, [dnl +save_CFLAGS="$CFLAGS" +CFLAGS="$save_CFLAGS -fPIC -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE()], ac_cv_fpic=yes, ac_cv_fpic=no) +CFLAGS="$save_CFLAGS" +]) +if test "$ac_cv_fpic" = "yes"; then + fpic_CFLAGS="-fPIC" +else + fpic_CFLAGS="" +fi +AC_SUBST([fpic_CFLAGS]) + +AC_CACHE_CHECK([whether gcc supports -fPIE], ac_cv_fpie, [dnl +save_CFLAGS="$CFLAGS" +CFLAGS="$save_CFLAGS -fPIE -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE()], ac_cv_fpie=yes, ac_cv_fpie=no) +CFLAGS="$save_CFLAGS" +]) +if test "$ac_cv_fpie" = "yes"; then + fpie_CFLAGS="-fPIE" +else + fpie_CFLAGS="" +fi +AC_SUBST([fpie_CFLAGS]) + +dso_LDFLAGS="-shared" + +ZDEFS_LDFLAGS="-Wl,-z,defs" +AC_CACHE_CHECK([whether gcc supports $ZDEFS_LDFLAGS], ac_cv_zdefs, [dnl +save_LDFLAGS="$LDFLAGS" +LDFLAGS="$ZDEFS_LDFLAGS $save_LDFLAGS" +AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_zdefs=yes, ac_cv_zdefs=no) +LDFLAGS="$save_LDFLAGS" +]) +if test "$ac_cv_zdefs" = "yes"; then + dso_LDFLAGS="$dso_LDFLAGS $ZDEFS_LDFLAGS" +fi + +ZRELRO_LDFLAGS="-Wl,-z,relro" +AC_CACHE_CHECK([whether gcc supports $ZRELRO_LDFLAGS], ac_cv_zrelro, [dnl +save_LDFLAGS="$LDFLAGS" +LDFLAGS="$ZRELRO_LDFLAGS $save_LDFLAGS" +AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_zrelro=yes, ac_cv_zrelro=no) +LDFLAGS="$save_LDFLAGS" +]) +if test "$ac_cv_zrelro" = "yes"; then + dso_LDFLAGS="$dso_LDFLAGS $ZRELRO_LDFLAGS" +fi + +AC_SUBST([dso_LDFLAGS]) + AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl # Use the same flags that we use for our DSOs, so the test is representative. # Some old compiler/linker/libc combinations fail some ways and not others. save_CFLAGS="$CFLAGS" save_LDFLAGS="$LDFLAGS" -CFLAGS="-fPIC $CFLAGS" -LDFLAGS="-shared -Wl,-z,defs,-z,relro $LDFLAGS" +CFLAGS="$fpic_CFLAGS $CFLAGS" +LDFLAGS="$dso_LDFLAGS $LDFLAGS" AC_LINK_IFELSE([dnl AC_LANG_PROGRAM([[#include <stdlib.h> #undef __thread @@ -295,6 +376,8 @@ AC_CHECK_DECLS([mempcpy],[],[], [#define _GNU_SOURCE #include <string.h>]) +AC_CHECK_FUNCS([process_vm_readv]) + AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])]) AM_CONDITIONAL(DEMANGLE, test "x$ac_cv_lib_stdcpp___cxa_demangle" = "xyes") @@ -311,6 +394,21 @@ AS_IF([test "x$enable_textrelcheck" != "xno"], AC_ARG_ENABLE([symbol-versioning], AS_HELP_STRING([--disable-symbol-versioning], [Disable symbol versioning in shared objects])) + +AC_CACHE_CHECK([whether symbol versioning is supported], ac_cv_symbol_versioning, [dnl +AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl +#define NEW_VERSION(name, version) \ + asm (".symver " #name "," #name "@@@" #version); +int foo(int x) { return x + 1; } +NEW_VERSION (foo, ELFUTILS_12.12) +])], ac_cv_symbol_versioning=yes, ac_cv_symbol_versioning=no)]) +if test "$ac_cv_symbol_versioning" = "no"; then + if test "x$enable_symbol_versioning" != "xno"; then + AC_MSG_ERROR([Symbol versioning is not supported. + Use --disable-symbol-versioning to build without.]) + fi +fi + AM_CONDITIONAL(SYMBOL_VERSIONING, [test "x$enable_symbol_versioning" != "xno"]) AS_IF([test "x$enable_symbol_versioning" = "xno"], [AC_MSG_WARN([Disabling symbol versioning breaks ABI compatibility.]) @@ -366,6 +464,12 @@ CFLAGS="$old_CFLAGS"]) AM_CONDITIONAL(HAVE_IMPLICIT_FALLTHROUGH_WARNING, [test "x$ac_cv_implicit_fallthrough" != "xno"]) +# Assume the fallthrough attribute is supported if -Wimplict-fallthrough is supported +if test "$ac_cv_implicit_fallthrough" = "yes"; then + AC_DEFINE([HAVE_FALLTHROUGH], [1], + [Defined if __attribute__((fallthrough)) is supported]) +fi + dnl Check if we have argp available from our libc AC_LINK_IFELSE( [AC_LANG_PROGRAM( |