138 lines
6.4 KiB
Plaintext
138 lines
6.4 KiB
Plaintext
http://gcc.gnu.org/ml/gcc-patches/2008-10/msg00269.html
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On glibc the libc.so carries a copy of the math function copysignl() but
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on uClibc math functions like copysignl() live in libm. Since libgcc_s
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contains unresolved symbols, any attempt to link against libgcc_s
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without explicitely specifying -lm fails, resulting in a broken
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bootstrap of the compiler.
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diff -rdup gcc-4.4.0.old/gcc/config/t-slibgcc-elf-ver gcc-4.4.0/gcc/config/t-slibgcc-elf-ver
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diff -durN gcc-4.4.4.orig/gcc/config/t-slibgcc-elf-ver gcc-4.4.4/gcc/config/t-slibgcc-elf-ver
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--- gcc-4.4.4.orig/gcc/config/t-slibgcc-elf-ver 2010-01-04 16:13:08.000000000 +0100
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+++ gcc-4.4.4/gcc/config/t-slibgcc-elf-ver 2010-05-16 19:38:36.000000000 +0200
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@@ -9,7 +9,7 @@
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SHLIB_OBJS = @shlib_objs@
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SHLIB_DIR = @multilib_dir@
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SHLIB_SLIBDIR_QUAL = @shlib_slibdir_qual@
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-SHLIB_LC = -lc
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+SHLIB_LC = @libgcc_libm@ -lc
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SHLIB_MAKE_SOLINK = $(LN_S) $(SHLIB_SONAME) $(SHLIB_DIR)/$(SHLIB_SOLINK)
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SHLIB_INSTALL_SOLINK = $(LN_S) $(SHLIB_SONAME) \
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$$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK)
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diff -durN gcc-4.4.4.orig/libgcc/Makefile.in gcc-4.4.4/libgcc/Makefile.in
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--- gcc-4.4.4.orig/libgcc/Makefile.in 2009-04-10 01:23:07.000000000 +0200
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+++ gcc-4.4.4/libgcc/Makefile.in 2010-05-16 19:38:36.000000000 +0200
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@@ -39,6 +39,7 @@
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decimal_float = @decimal_float@
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enable_decimal_float = @enable_decimal_float@
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fixed_point = @fixed_point@
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+LIBGCC_LIBM = @LIBGCC_LIBM@
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host_noncanonical = @host_noncanonical@
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@@ -787,9 +788,10 @@
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@multilib_dir@,$(MULTIDIR),$(subst \
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@shlib_objs@,$(objects),$(subst \
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@shlib_base_name@,libgcc_s,$(subst \
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+ @libgcc_libm@,$(LIBGCC_LIBM),$(subst \
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@shlib_map_file@,$(mapfile),$(subst \
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@shlib_slibdir_qual@,$(MULTIOSSUBDIR),$(subst \
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- @shlib_slibdir@,$(shlib_slibdir),$(SHLIB_LINK))))))))
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+ @shlib_slibdir@,$(shlib_slibdir),$(SHLIB_LINK)))))))))
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libunwind$(SHLIB_EXT): $(libunwind-s-objects) $(extra-parts)
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# @multilib_flags@ is still needed because this may use
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diff -durN gcc-4.4.4.orig/libgcc/configure gcc-4.4.4/libgcc/configure
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--- gcc-4.4.4.orig/libgcc/configure 2008-11-20 18:13:01.000000000 +0100
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+++ gcc-4.4.4/libgcc/configure 2010-05-16 19:38:36.000000000 +0200
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@@ -272,7 +272,7 @@
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PACKAGE_BUGREPORT=''
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ac_unique_file="static-object.mk"
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-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS libgcc_topdir enable_shared slibdir INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA AWK build build_cpu build_vendor build_os host host_cpu host_vendor host_os host_noncanonical build_libsubdir build_subdir host_subdir target_subdir AR ac_ct_AR LIPO ac_ct_LIPO NM ac_ct_NM RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP LN_S CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP decimal_float enable_decimal_float fixed_point vis_hide set_have_cc_tls tmake_file extra_parts asm_hidden_op LIBOBJS LTLIBOBJS'
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+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS libgcc_topdir enable_shared slibdir INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA AWK build build_cpu build_vendor build_os host host_cpu host_vendor host_os host_noncanonical build_libsubdir build_subdir host_subdir target_subdir AR ac_ct_AR LIPO ac_ct_LIPO NM ac_ct_NM RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP LN_S CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP decimal_float enable_decimal_float fixed_point vis_hide set_have_cc_tls LIBGCC_LIBM tmake_file extra_parts asm_hidden_op LIBOBJS LTLIBOBJS'
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ac_subst_files=''
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ac_pwd=`pwd`
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@@ -3547,6 +3547,39 @@
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fi
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+# On powerpc libgcc_s references copysignl which is a libm function but
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+# glibc apparently also provides it via libc as opposed to uClibc where
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+# it lives in libm.
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+echo "$as_me:$LINENO: checking for library containing copysignl" >&5
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+echo $ECHO_N "checking for library containing copysignl... $ECHO_C" >&6
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+if test "${libgcc_cv_copysignl_lib+set}" = set; then
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+ echo $ECHO_N "(cached) $ECHO_C" >&6
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+else
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+
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+ echo '#include <features.h>' > conftest.c
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+ echo 'int the_libc = __UCLIBC__ + __powerpc__;' >> conftest.c
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+ libgcc_cv_copysignl_lib="-lc"
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+ if { ac_try='${CC-cc} -S conftest.c -o conftest.s 1>&5'
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+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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+ (eval $ac_try) 2>&5
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+ ac_status=$?
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+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
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+ (exit $ac_status); }; }
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+ then
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+ libgcc_cv_copysignl_lib="-lm"
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+ fi
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+ rm -f conftest.*
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+
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+fi
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+echo "$as_me:$LINENO: result: $libgcc_cv_copysignl_lib" >&5
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+echo "${ECHO_T}$libgcc_cv_copysignl_lib" >&6
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+
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+case /${libgcc_cv_copysignl_lib}/ in
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+ /-lm/) LIBGCC_LIBM="$LIBGCC_LIBM -lm" ;;
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+ *) LIBGCC_LIBM= ;;
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+esac
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+
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+
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# Conditionalize the makefile for this target machine.
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tmake_file_=
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for f in ${tmake_file}
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@@ -4267,6 +4300,7 @@
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s,@fixed_point@,$fixed_point,;t t
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s,@vis_hide@,$vis_hide,;t t
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s,@set_have_cc_tls@,$set_have_cc_tls,;t t
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+s,@LIBGCC_LIBM@,$LIBGCC_LIBM,;t t
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s,@tmake_file@,$tmake_file,;t t
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s,@extra_parts@,$extra_parts,;t t
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s,@asm_hidden_op@,$asm_hidden_op,;t t
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diff -durN gcc-4.4.4.orig/libgcc/configure.ac gcc-4.4.4/libgcc/configure.ac
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--- gcc-4.4.4.orig/libgcc/configure.ac 2008-11-20 18:13:01.000000000 +0100
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+++ gcc-4.4.4/libgcc/configure.ac 2010-05-16 19:38:36.000000000 +0200
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@@ -223,6 +223,27 @@
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fi
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AC_SUBST(set_have_cc_tls)
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+# On powerpc libgcc_s references copysignl which is a libm function but
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+# glibc apparently also provides it via libc as opposed to uClibc where
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+# it lives in libm.
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+AC_CACHE_CHECK
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+ libgcc_cv_copysignl_lib,
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+ echo '#include <features.h>' > conftest.c
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+ echo 'int the_libc = __UCLIBC__ + __powerpc__;' >> conftest.c
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+ libgcc_cv_copysignl_lib="-lc"
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+ if AC_TRY_COMMAND(${CC-cc} -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD)
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+ then
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+ libgcc_cv_copysignl_lib="-lm"
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+ fi
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+ rm -f conftest.*
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+ ])
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+
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+case /${libgcc_cv_copysignl_lib}/ in
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+ /-lm/) LIBGCC_LIBM="$LIBGCC_LIBM -lm" ;;
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+ *) LIBGCC_LIBM= ;;
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+esac
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+AC_SUBST(LIBGCC_LIBM)
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+
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# Conditionalize the makefile for this target machine.
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tmake_file_=
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for f in ${tmake_file}
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