From da612d62260220618af9be428aa827d5d04f344f Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Tue, 1 Jun 2010 14:56:56 +0000 Subject: -retain-symbols-file is not what it seems. Update the makefiles and configury to use --version-script. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105271 91177308-0d34-0410-b5e6-96231b3b80d8 --- Makefile.config.in | 4 ++-- Makefile.rules | 17 +++++++++++++++-- autoconf/configure.ac | 4 ++-- autoconf/m4/link_options.m4 | 23 +++++++++++++---------- configure | 33 ++++++++++++++++++--------------- 5 files changed, 50 insertions(+), 31 deletions(-) diff --git a/Makefile.config.in b/Makefile.config.in index ec11bb3a52..6c0e5e9898 100644 --- a/Makefile.config.in +++ b/Makefile.config.in @@ -344,5 +344,5 @@ NO_MISSING_FIELD_INITIALIZERS = @NO_MISSING_FIELD_INITIALIZERS@ NO_VARIADIC_MACROS = @NO_VARIADIC_MACROS@ # Flags supported by the linker. -# bfd ld / gold -retain-symbols-file file -HAVE_LINK_RETAIN_SYMBOLS_FILE = @HAVE_LINK_RETAIN_SYMBOLS_FILE@ +# bfd ld / gold --version-script=file +HAVE_LINK_VERSION_SCRIPT = @HAVE_LINK_VERSION_SCRIPT@ diff --git a/Makefile.rules b/Makefile.rules index 408588132f..942cb9d4d7 100644 --- a/Makefile.rules +++ b/Makefile.rules @@ -990,8 +990,21 @@ $(NativeExportsFile): $(EXPORTED_SYMBOL_FILE) $(ObjDir)/.dir clean-local:: -$(Verb) $(RM) -f $(NativeExportsFile) else +ifeq ($(HAVE_LINK_VERSION_SCRIPT),1) +# Gold and BFD ld require a version script rather than a plain list. +NativeExportsFile := $(ObjDir)/$(notdir $(EXPORTED_SYMBOL_FILE)).map +$(NativeExportsFile): $(EXPORTED_SYMBOL_FILE) $(ObjDir)/.dir + $(Verb) echo "{" > $@ + $(Verb) grep -q "\<" $< && echo " global:" >> $@ || : + $(Verb) sed -e 's/\>/;/' -e 's/^\> $@ + $(Verb) echo " local: *;" >> $@ + $(Verb) echo "};" >> $@ +clean-local:: + -$(Verb) $(RM) -f $(NativeExportsFile) +else NativeExportsFile := $(EXPORTED_SYMBOL_FILE) endif +endif # Now add the linker command-line options to use the native export file. @@ -1000,8 +1013,8 @@ LLVMLibsOptions += -Wl,-exported_symbols_list,$(NativeExportsFile) endif # gold, bfd ld, etc. -ifeq ($(HAVE_LINK_RETAIN_SYMBOLS_FILE),1) -LLVMLibsOptions += -Wl,-retain-symbols-file,$(NativeExportsFile) +ifeq ($(HAVE_LINK_VERSION_SCRIPT),1) +LLVMLibsOptions += -Wl,--version-script,$(NativeExportsFile) endif endif diff --git a/autoconf/configure.ac b/autoconf/configure.ac index 8487d9403c..66f5383091 100644 --- a/autoconf/configure.ac +++ b/autoconf/configure.ac @@ -1039,8 +1039,8 @@ AC_LINK_USE_R dnl Determine whether the linker supports the -export-dynamic option. AC_LINK_EXPORT_DYNAMIC -dnl Determine whether the linker supports the -retain-symbols-file option. -AC_LINK_RETAIN_SYMBOLS_FILE +dnl Determine whether the linker supports the --version-script option. +AC_LINK_VERSION_SCRIPT dnl Check for libtool and the library that has dlopen function (which must come dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with diff --git a/autoconf/m4/link_options.m4 b/autoconf/m4/link_options.m4 index 697abab07d..251c8a4f50 100644 --- a/autoconf/m4/link_options.m4 +++ b/autoconf/m4/link_options.m4 @@ -40,14 +40,14 @@ if test "$llvm_cv_link_use_export_dynamic" = yes ; then ]) # -# Determine if the system can handle the -retain-symbols-file option being +# Determine if the system can handle the --version-script option being # passed to the linker. # # This macro is specific to LLVM. # -AC_DEFUN([AC_LINK_RETAIN_SYMBOLS_FILE], -[AC_CACHE_CHECK([for compiler -Wl,-retain-symbols-file option], - [llvm_cv_link_use_retain_symbols_file], +AC_DEFUN([AC_LINK_VERSION_SCRIPT], +[AC_CACHE_CHECK([for compiler -Wl,--version-script option], + [llvm_cv_link_use_version_script], [ AC_LANG_PUSH([C]) oldcflags="$CFLAGS" @@ -67,18 +67,21 @@ AC_DEFUN([AC_LINK_RETAIN_SYMBOLS_FILE], (umask 077 && mkdir "$tmp") } || exit $? - echo "main" > "$tmp/exports" + echo "{" > "$tmp/export.map" + echo " global: main;" >> "$tmp/export.map" + echo " local: *;" >> "$tmp/export.map" + echo "};" >> "$tmp/export.map" - CFLAGS="$CFLAGS -Wl,-retain-symbols-file=$tmp/exports" + CFLAGS="$CFLAGS -Wl,--version-script=$tmp/export.map" AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[]])], - [llvm_cv_link_use_retain_symbols_file=yes],[llvm_cv_link_use_retain_symbols_file=no]) - rm "$tmp/exports" + [llvm_cv_link_use_version_script=yes],[llvm_cv_link_version_script=no]) + rm "$tmp/export.map" rmdir "$tmp" CFLAGS="$oldcflags" AC_LANG_POP([C]) ]) -if test "$llvm_cv_link_use_retain_symbols_file" = yes ; then - AC_SUBST(HAVE_LINK_RETAIN_SYMBOLS_FILE,1) +if test "$llvm_cv_link_use_version_script" = yes ; then + AC_SUBST(HAVE_LINK_VERSION_SCRIPT,1) fi ]) diff --git a/configure b/configure index 755746ff50..668e579afc 100755 --- a/configure +++ b/configure @@ -752,7 +752,7 @@ OCAMLOPT OCAMLDEP OCAMLDOC GAS -HAVE_LINK_RETAIN_SYMBOLS_FILE +HAVE_LINK_VERSION_SCRIPT INSTALL_LTDL_TRUE INSTALL_LTDL_FALSE CONVENIENCE_LTDL_TRUE @@ -8905,9 +8905,9 @@ _ACEOF fi -{ echo "$as_me:$LINENO: checking for compiler -Wl,-retain-symbols-file option" >&5 -echo $ECHO_N "checking for compiler -Wl,-retain-symbols-file option... $ECHO_C" >&6; } -if test "${llvm_cv_link_use_retain_symbols_file+set}" = set; then +{ echo "$as_me:$LINENO: checking for compiler -Wl,--version-script option" >&5 +echo $ECHO_N "checking for compiler -Wl,--version-script option... $ECHO_C" >&6; } +if test "${llvm_cv_link_use_version_script+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else ac_ext=c @@ -8934,9 +8934,12 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu (umask 077 && mkdir "$tmp") } || exit $? - echo "main" > "$tmp/exports" + echo "{" > "$tmp/export.map" + echo " global: main;" >> "$tmp/export.map" + echo " local: *;" >> "$tmp/export.map" + echo "};" >> "$tmp/export.map" - CFLAGS="$CFLAGS -Wl,-retain-symbols-file=$tmp/exports" + CFLAGS="$CFLAGS -Wl,--version-script=$tmp/export.map" cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF @@ -8986,17 +8989,17 @@ eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; }; then - llvm_cv_link_use_retain_symbols_file=yes + llvm_cv_link_use_version_script=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 - llvm_cv_link_use_retain_symbols_file=no + llvm_cv_link_version_script=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext - rm "$tmp/exports" + rm "$tmp/export.map" rmdir "$tmp" CFLAGS="$oldcflags" ac_ext=c @@ -9007,10 +9010,10 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu fi -{ echo "$as_me:$LINENO: result: $llvm_cv_link_use_retain_symbols_file" >&5 -echo "${ECHO_T}$llvm_cv_link_use_retain_symbols_file" >&6; } -if test "$llvm_cv_link_use_retain_symbols_file" = yes ; then - HAVE_LINK_RETAIN_SYMBOLS_FILE=1 +{ echo "$as_me:$LINENO: result: $llvm_cv_link_use_version_script" >&5 +echo "${ECHO_T}$llvm_cv_link_use_version_script" >&6; } +if test "$llvm_cv_link_use_version_script" = yes ; then + HAVE_LINK_VERSION_SCRIPT=1 fi @@ -11384,7 +11387,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <