diff options
Diffstat (limited to 'toolchain/gcc/4.7.1/powerpc-link-with-math-lib.patch.conditional')
| -rw-r--r-- | toolchain/gcc/4.7.1/powerpc-link-with-math-lib.patch.conditional | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/toolchain/gcc/4.7.1/powerpc-link-with-math-lib.patch.conditional b/toolchain/gcc/4.7.1/powerpc-link-with-math-lib.patch.conditional new file mode 100644 index 000000000..7e75e87f2 --- /dev/null +++ b/toolchain/gcc/4.7.1/powerpc-link-with-math-lib.patch.conditional @@ -0,0 +1,125 @@ +http://gcc.gnu.org/ml/gcc-patches/2008-10/msg00269.html + +On glibc the libc.so carries a copy of the math function copysignl() but +on uClibc math functions like copysignl() live in libm. Since libgcc_s +contains unresolved symbols, any attempt to link against libgcc_s +without explicitely specifying -lm fails, resulting in a broken +bootstrap of the compiler. + +Forward port to gcc 4.5.1 by Gustavo Zacarias <gustavo@zacarias.com.ar> + +diff -Nura gcc-4.5.1.orig/gcc/config/t-slibgcc-elf-ver gcc-4.5.1/gcc/config/t-slibgcc-elf-ver +--- gcc-4.5.1.orig/gcc/config/t-slibgcc-elf-ver 2010-11-03 14:35:08.644904042 -0300 ++++ gcc-4.5.1/gcc/config/t-slibgcc-elf-ver 2010-11-03 14:35:56.332904024 -0300 +@@ -27,7 +27,7 @@ + SHLIB_OBJS = @shlib_objs@ + SHLIB_DIR = @multilib_dir@ + SHLIB_SLIBDIR_QUAL = @shlib_slibdir_qual@ +-SHLIB_LC = -lc ++SHLIB_LC = @libgcc_libm@ -lc + SHLIB_MAKE_SOLINK = $(LN_S) $(SHLIB_SONAME) $(SHLIB_DIR)/$(SHLIB_SOLINK) + SHLIB_INSTALL_SOLINK = $(LN_S) $(SHLIB_SONAME) \ + $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK) +diff -Nura gcc-4.5.1.orig/libgcc/Makefile.in gcc-4.5.1/libgcc/Makefile.in +--- gcc-4.5.1.orig/libgcc/Makefile.in 2010-11-03 14:32:44.272904042 -0300 ++++ gcc-4.5.1/libgcc/Makefile.in 2010-11-03 14:37:03.893904042 -0300 +@@ -39,6 +39,7 @@ + decimal_float = @decimal_float@ + enable_decimal_float = @enable_decimal_float@ + fixed_point = @fixed_point@ ++LIBGCC_LIBM = @LIBGCC_LIBM@ + + host_noncanonical = @host_noncanonical@ + +@@ -798,9 +799,10 @@ + @multilib_dir@,$(MULTIDIR),$(subst \ + @shlib_objs@,$(objects),$(subst \ + @shlib_base_name@,libgcc_s,$(subst \ ++ @libgcc_libm@,$(LIBGCC_LIBM),$(subst \ + @shlib_map_file@,$(mapfile),$(subst \ + @shlib_slibdir_qual@,$(MULTIOSSUBDIR),$(subst \ +- @shlib_slibdir@,$(shlib_slibdir),$(SHLIB_LINK)))))))) ++ @shlib_slibdir@,$(shlib_slibdir),$(SHLIB_LINK))))))))) + + libunwind$(SHLIB_EXT): $(libunwind-s-objects) $(extra-parts) + # @multilib_flags@ is still needed because this may use +diff -Nura gcc-4.5.1.orig/libgcc/configure gcc-4.5.1/libgcc/configure +--- gcc-4.5.1.orig/libgcc/configure 2010-11-03 14:32:44.283904042 -0300 ++++ gcc-4.5.1/libgcc/configure 2010-11-03 14:39:48.685904042 -0300 +@@ -557,6 +557,7 @@ + extra_parts + tmake_file + set_use_emutls ++LIBGCC_LIBM + set_have_cc_tls + vis_hide + fixed_point +@@ -3847,6 +3848,37 @@ + set_use_emutls="-DUSE_EMUTLS" + fi + ++# On powerpc libgcc_s references copysignl which is a libm function but ++# glibc apparently also provides it via libc as opposed to uClibc where ++# it lives in libm. ++echo "$as_me:$LINENO: checking for library containing copysignl" >&5 ++echo $ECHO_N "checking for library containing copysignl... $ECHO_C" >&6 ++if test "${libgcc_cv_copysignl_lib+set}" = set; then ++ echo $ECHO_N "(cached) $ECHO_C" >&6 ++else ++ ++ echo '#include <features.h>' > conftest.c ++ echo 'int the_libc = __UCLIBC__ + __powerpc__;' >> conftest.c ++ libgcc_cv_copysignl_lib="-lc" ++ if { ac_try='${CC-cc} -S conftest.c -o conftest.s 1>&5' ++ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 ++ (eval $ac_try) 2>&5 ++ ac_status=$? ++ echo "$as_me:$LINENO: \$? = $ac_status" >&5 ++ (exit $ac_status); }; } ++ then ++ libgcc_cv_copysignl_lib="-lm" ++ fi ++ rm -f conftest.* ++ ++fi ++echo "$as_me:$LINENO: result: $libgcc_cv_copysignl_lib" >&5 ++echo "${ECHO_T}$libgcc_cv_copysignl_lib" >&6 ++ ++case /${libgcc_cv_copysignl_lib}/ in ++ /-lm/) LIBGCC_LIBM="$LIBGCC_LIBM -lm" ;; ++ *) LIBGCC_LIBM= ;; ++esac + + # Conditionalize the makefile for this target machine. + tmake_file_= +diff -Nura gcc-4.5.1.orig/libgcc/configure.ac gcc-4.5.1/libgcc/configure.ac +--- gcc-4.5.1.orig/libgcc/configure.ac 2010-11-03 14:32:44.735904042 -0300 ++++ gcc-4.5.1/libgcc/configure.ac 2010-11-03 14:42:11.278904045 -0300 +@@ -238,6 +238,27 @@ + fi + AC_SUBST(set_have_cc_tls) + ++# On powerpc libgcc_s references copysignl which is a libm function but ++# glibc apparently also provides it via libc as opposed to uClibc where ++# it lives in libm. ++AC_CACHE_CHECK ++ libgcc_cv_copysignl_lib, ++ echo '#include <features.h>' > conftest.c ++ echo 'int the_libc = __UCLIBC__ + __powerpc__;' >> conftest.c ++ libgcc_cv_copysignl_lib="-lc" ++ if AC_TRY_COMMAND(${CC-cc} -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD) ++ then ++ libgcc_cv_copysignl_lib="-lm" ++ fi ++ rm -f conftest.* ++ ]) ++ ++case /${libgcc_cv_copysignl_lib}/ in ++ /-lm/) LIBGCC_LIBM="$LIBGCC_LIBM -lm" ;; ++ *) LIBGCC_LIBM= ;; ++esac ++AC_SUBST(LIBGCC_LIBM) ++ + # See if we have emulated thread-local storage. + GCC_CHECK_EMUTLS + set_use_emutls= |