gcc: fix build with mold

Mold fails to dynamically link GCC, static linking works fine.
This should hopefully be fixed upstream soon.

core/gcc/build

@@ -24,9 +24,15 @@ case $2 in "$gcc_version"*)
     bootstrap=--disable-bootstrap
 esac
 
-export libat_cv_have_ifunc=no
+# Mold fails to dynamically link GCC, static linking works fine and does not
+# result in a large size increase (quite resonable). This will hopefully be
+# fixed upstream soon.
+case $CFLAGS$CXXFLAGS$(ld --version) in *mold*)
+    patch -p1 < static-bin.patch
+esac
 
 ../gcc/configure \
+    libat_cv_have_ifunc=no \
     --prefix=/usr \
     --libexecdir=/usr/lib \
     --mandir=/usr/share/man \

core/gcc/checksums

@@ -3,3 +3,4 @@ fd4829912cddd12f84181c3451cc752be224643e87fac497b69edddadc49b4f2
 0c98a3f1732ff6ca4ea690552079da9c597872d30e96ec28414ee23c95558a7f
 17503d2c395dfcf106b622dc142683c1199431d095367c6aacba6eec30340459
 765614b3396d70bca3fa0ae4a813632486c6dca320e2bd13c8c39dca52be4a4c
+8ed32145f35344c58f365fa337a1db2eac147a7647847093ab34a44ca4ccdc34

core/gcc/patches/static-bin.patch

@@ -0,0 +1,22 @@
+diff --git a/gcc/gcc/Makefile.in b/gcc/gcc/Makefile.in
+index 8a5fb3f..9b12f75 100644
+--- a/gcc/gcc/Makefile.in
++++ b/gcc/gcc/Makefile.in
+@@ -1060,7 +1060,7 @@ ALL_CPPFLAGS = $(INCLUDES) $(CPPFLAGS)
+ ALL_COMPILERFLAGS = $(ALL_CXXFLAGS)
+
+ # This is the variable to use when using $(LINKER).
+-ALL_LINKERFLAGS = $(ALL_CXXFLAGS)
++ALL_LINKERFLAGS = $(ALL_CXXFLAGS) -static
+
+ # Build and host support libraries.
+
+@@ -2967,7 +2967,7 @@ gengtype$(exeext) : gengtype.o gengtype-lex.o gengtype-parse.o \
+ # Rule for the generator programs:
+ $(genprog:%=build/gen%$(build_exeext)): build/gen%$(build_exeext): build/gen%.o $(BUILD_LIBDEPS)
+ 	+$(LINKER_FOR_BUILD) $(BUILD_LINKERFLAGS) $(BUILD_LDFLAGS) -o $@ \
+-	    $(filter-out $(BUILD_LIBDEPS), $^) $(BUILD_LIBS)
++	    $(filter-out $(BUILD_LIBDEPS), $^) $(BUILD_LIBS) -static
+
+ omp-general.o: omp-device-properties.h
+

core/gcc/sources

@@ -3,3 +3,4 @@ https://ftp.gnu.org/gnu/gmp/gmp-6.2.1.tar.xz gcc/gmp
 https://ftp.gnu.org/gnu/mpfr/mpfr-4.1.0.tar.xz gcc/mpfr
 https://ftp.gnu.org/gnu/mpc/mpc-1.2.1.tar.gz gcc/mpc
 files/c99
+patches/static-bin.patch