dd798a45c5
Signed-off-by: Samuel Martin <s.martin49@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
128 lines
4.4 KiB
Plaintext
128 lines
4.4 KiB
Plaintext
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 ported to gcc 4.7.3
|
|
|
|
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
|
|
|
|
diff -Nura gcc-4.7.3.orig/libgcc/config/t-slibgcc gcc-4.7.3/libgcc/config/t-slibgcc
|
|
--- gcc-4.7.3.orig/libgcc/config/t-slibgcc 2013-04-11 15:23:46.491571116 -0300
|
|
+++ gcc-4.7.3/libgcc/config/t-slibgcc 2013-04-11 15:25:06.241141824 -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-4.7.3.orig/libgcc/configure gcc-4.7.3/libgcc/configure
|
|
--- gcc-4.7.3.orig/libgcc/configure 2013-04-11 15:23:46.551573051 -0300
|
|
+++ gcc-4.7.3/libgcc/configure 2013-04-11 15:25:06.243141875 -0300
|
|
@@ -563,6 +563,7 @@
|
|
tmake_file
|
|
sfp_machine_header
|
|
set_use_emutls
|
|
+LIBGCC_LIBM
|
|
set_have_cc_tls
|
|
vis_hide
|
|
fixed_point
|
|
@@ -4445,6 +4446,37 @@
|
|
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="$LIBGCC_LIBM -lm" ;;
|
|
+ *) LIBGCC_LIBM= ;;
|
|
+esac
|
|
|
|
# Conditionalize the makefile for this target machine.
|
|
tmake_file_=
|
|
diff -Nura gcc-4.7.3.orig/libgcc/configure.ac gcc-4.7.3/libgcc/configure.ac
|
|
--- gcc-4.7.3.orig/libgcc/configure.ac 2013-04-11 15:23:46.551573051 -0300
|
|
+++ gcc-4.7.3/libgcc/configure.ac 2013-04-11 15:25:06.244141901 -0300
|
|
@@ -324,6 +324,27 @@
|
|
fi
|
|
AC_SUBST(set_have_cc_tls)
|
|
|
|
+# On powerpc libgcc_s references copysignl which is a libm function but
|
|
+# glibc apparently also provides it via libc as opposed to uClibc where
|
|
+# it lives in libm.
|
|
+AC_CACHE_CHECK
|
|
+ libgcc_cv_copysignl_lib,
|
|
+ echo '#include <features.h>' > conftest.c
|
|
+ echo 'int the_libc = __UCLIBC__ + __powerpc__;' >> conftest.c
|
|
+ libgcc_cv_copysignl_lib="-lc"
|
|
+ if AC_TRY_COMMAND(${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=
|
|
diff -Nura gcc-4.7.3.orig/libgcc/Makefile.in gcc-4.7.3/libgcc/Makefile.in
|
|
--- gcc-4.7.3.orig/libgcc/Makefile.in 2013-04-11 15:23:46.537572599 -0300
|
|
+++ gcc-4.7.3/libgcc/Makefile.in 2013-04-11 15:25:06.241141824 -0300
|
|
@@ -41,6 +41,7 @@
|
|
decimal_float = @decimal_float@
|
|
enable_decimal_float = @enable_decimal_float@
|
|
fixed_point = @fixed_point@
|
|
+LIBGCC_LIBM = @LIBGCC_LIBM@
|
|
|
|
host_noncanonical = @host_noncanonical@
|
|
target_noncanonical = @target_noncanonical@
|
|
@@ -928,9 +929,10 @@
|
|
@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
|