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[packages/trusty/cirros-testvm.git] / cirros-testvm / src-cirros / buildroot-2015.05 / package / gcc / 4.7.4 / 1000-powerpc-link-with-math-lib.patch.conditional

diff --git a/cirros-testvm/src-cirros/buildroot-2015.05/package/gcc/4.7.4/1000-powerpc-link-with-math-lib.patch.conditional b/cirros-testvm/src-cirros/buildroot-2015.05/package/gcc/4.7.4/1000-powerpc-link-with-math-lib.patch.conditional
new file mode 100644 (file)
index 0000000..2554263
--- /dev/null
+++ b/cirros-testvm/src-cirros/buildroot-2015.05/package/gcc/4.7.4/1000-powerpc-link-with-math-lib.patch.conditional
@@ -0,0 +1,127 @@
+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