diff options
Diffstat (limited to 'patches/gcc/4.9.4/1000-powerpc-link-with-math-lib.patch.conditional')
| -rw-r--r-- | patches/gcc/4.9.4/1000-powerpc-link-with-math-lib.patch.conditional | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/patches/gcc/4.9.4/1000-powerpc-link-with-math-lib.patch.conditional b/patches/gcc/4.9.4/1000-powerpc-link-with-math-lib.patch.conditional new file mode 100644 index 0000000..5e0484f --- /dev/null +++ b/patches/gcc/4.9.4/1000-powerpc-link-with-math-lib.patch.conditional @@ -0,0 +1,122 @@ +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> + +--- + libgcc/Makefile.in | 4 +++- + libgcc/configure | 32 ++++++++++++++++++++++++++++++++ + libgcc/configure.ac | 21 +++++++++++++++++++++ + 3 files changed, 56 insertions(+), 1 deletion(-) + +Index: b/libgcc/Makefile.in +=================================================================== +--- a/libgcc/Makefile.in ++++ b/libgcc/Makefile.in +@@ -42,6 +42,7 @@ + enable_vtable_verify = @enable_vtable_verify@ + enable_decimal_float = @enable_decimal_float@ + fixed_point = @fixed_point@ ++LIBGCC_LIBM = @LIBGCC_LIBM@ + + host_noncanonical = @host_noncanonical@ + target_noncanonical = @target_noncanonical@ +@@ -943,9 +944,10 @@ + @multilib_dir@,$(MULTIDIR),$(subst \ + @shlib_objs@,$(objects) libgcc.a,$(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) $(extra-parts) + # @multilib_flags@ is still needed because this may use +Index: b/libgcc/configure +=================================================================== +--- a/libgcc/configure ++++ b/libgcc/configure +@@ -564,6 +564,7 @@ + tmake_file + sfp_machine_header + set_use_emutls ++LIBGCC_LIBM + set_have_cc_tls + vis_hide + fixed_point +@@ -4535,6 +4536,37 @@ + fi + fi + ++# On powerpc libgcc_s references copysignl which is a libm function but ++# glibc apparently also provides it via libc as opposed to uClibc where ++# it lives in libm. ++echo "$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="$LIBGCC_LIBM -lm" ;; ++ *) LIBGCC_LIBM= ;; ++esac + + # Conditionalize the makefile for this target machine. + tmake_file_= +Index: b/libgcc/configure.ac +=================================================================== +--- a/libgcc/configure.ac ++++ b/libgcc/configure.ac +@@ -357,6 +357,27 @@ + fi + AC_SUBST(set_have_cc_tls) + ++# On powerpc libgcc_s references copysignl which is a libm function but ++# glibc apparently also provides it via libc as opposed to uClibc where ++# it lives in libm. ++AC_CACHE_CHECK ++ libgcc_cv_copysignl_lib, ++ echo '#include <features.h>' > conftest.c ++ echo 'int the_libc = __UCLIBC__ + __powerpc__;' >> conftest.c ++ libgcc_cv_copysignl_lib="-lc" ++ if AC_TRY_COMMAND(${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= |