openjdk9-bootstap: needs -fcommon for gcc10

Also add patch to detect compiler versions with major greater than 9.

[ci skip]

srcpkgs/openjdk9-bootstrap/patches/fix-compiler-version-10+.patch

@@ -0,0 +1,31 @@
+--- a/common/autoconf/generated-configure.sh	2017-12-20 00:25:20.000000000 +0100
++++ b/common/autoconf/generated-configure.sh	2020-08-18 23:29:24.482332056 +0200
+@@ -34082,7 +34082,7 @@
+     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT | \
+         $SED -e 's/ *[Uu]sage:.*//'`
+     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
+-        $SED -e "s/^.*[ ,\t]$COMPILER_NAME[ ,\t]\([1-9]\.[0-9][0-9]*\).*/\1/"`
++        $SED -e "s/^.*[ ,\t]$COMPILER_NAME[ ,\t]\([1-9][0-9]*\.[0-9][0-9]*\).*/\1/"`
+   elif test  "x$TOOLCHAIN_TYPE" = xxlc; then
+     # xlc -qversion output typically looks like
+     #     IBM XL C/C++ for AIX, V11.1 (5724-X13)
+@@ -34143,7 +34143,7 @@
+     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT | \
+         $SED -e 's/ *Copyright .*//'`
+     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
+-        $SED -e 's/^.* \([1-9]\.[0-9.]*\)[^0-9.].*$/\1/'`
++        $SED -e 's/^.* \([1-9][0-9]*\.[0-9.]*\)[^0-9.].*$/\1/'`
+   elif test  "x$TOOLCHAIN_TYPE" = xclang; then
+     # clang --version output typically looks like
+     #    Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
+--- a/common/autoconf/toolchain.m4	2017-12-20 00:25:20.000000000 +0100
++++ b/common/autoconf/toolchain.m4	2020-08-18 23:32:12.832325343 +0200
+@@ -424,7 +424,7 @@
+     # Collapse compiler output into a single line
+     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT`
+     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
+-        $SED -e 's/^.* version \(@<:@1-9@:>@@<:@0-9.@:>@*\).*$/\1/'`
++        $SED -e 's/^.* version \(@<:@1-9@:>@@<:@0-9@:>@*\.@<:@0-9.@:>@*\).*$/\1/'`
+   else
+       AC_MSG_ERROR([Unknown toolchain type $TOOLCHAIN_TYPE.])
+   fi

srcpkgs/openjdk9-bootstrap/template

@@ -108,6 +108,8 @@ do_configure() {
 			CXXFLAGS+=" -DABI_ELFv2"
 			;;
 	esac
+	CFLAGS+=" -fcommon"
+	CXXFLAGS+=" -fcommon"
 
 	configure_args=${configure_args/--with-libtool-sysroot=\/usr\/[a-z0-9]*-linux-[a-z]*/}