[PATCH] configure.ac: honor --with-gcc-major-version in gcc-driver-name.h (PR jit/85384, variant)

[Jakub Jelinek <jakub@redhat.com>]

On Thu, Apr 12, 2018 at 04:51:21PM -0400, David Malcolm wrote:
> This patch updates gcc/configure.ac to use gcc_base_ver.
> 
> I had to drop the \$\$ from the sed expression to get it to work
> within the configure script; I'm not entirely sure what their purpose
> is.  Without them, it's still matching on the first group of numeric
> characters in BASE-VER.
> 
> Tested with and without --with-gcc-major-version; in each case,
> gcc-driver-name.h is correctly determined.
> 
> Fixes the linker issue reported downstream in
>   https://bugzilla.redhat.com/show_bug.cgi?id=1566178
> and fixes the driver not found issue with:
>   gcc_jit_context_set_bool_use_external_driver (ctxt, 1);
> 
> Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.
> 
> OK for trunk?
> 
> config/ChangeLog:
> 	PR jit/85384
> 	* acx.m4 (GCC_BASE_VER): Remove \$\$ from sed expression.
> 
> gcc/ChangeLog:
> 	PR jit/85384
> 	* configure.ac (gcc-driver-name.h): Honor --with-gcc-major-version
> 	by using gcc_base_ver to generate a gcc_driver_version, and use
> 	it when generating GCC_DRIVER_NAME.
> 	* configure.ac: Regenerate.

Here is the variant I've talked about in patch form.  Bootstrapped/regtested
on x86_64-linux and i686-linux and tested with
--enable-languages=jit --enable-host-shared --disable-bootstrap
and
--enable-languages=jit --enable-host-shared --disable-bootstrap --with-gcc-major-version-only
Ok for trunk?

2018-04-13  Jakub Jelinek  <jakub@redhat.com>

	PR jit/85384
	* configure.ac (GCC_DRIVER_NAME): For --with-gcc-major-version-only
	use just major version in the driver filename rather than full
	version.
	* configure: Regenerated.

--- gcc/configure.ac.jj	2018-04-12 10:22:56.179162225 +0200
+++ gcc/configure.ac	2018-04-13 16:16:02.712459619 +0200
@@ -6499,8 +6499,14 @@ AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEF
 
 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
 # of jit/jit-playback.c.
+changequote(,)dnl
+gcc_driver_version=$gcc_BASEVER
+if test x$with_gcc_major_version_only = xyes ; then
+  gcc_driver_version=`echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
+fi
+changequote([,])dnl
 cat > gcc-driver-name.h <<EOF
-#define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_BASEVER}${exeext}"
+#define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_driver_version}${exeext}"
 EOF
 
 # Check whether --enable-default-pie was given.
--- gcc/configure.jj	2018-04-12 10:22:56.256162248 +0200
+++ gcc/configure	2018-04-13 16:16:17.551468697 +0200
@@ -30084,8 +30084,12 @@ _ACEOF
 
 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
 # of jit/jit-playback.c.
+gcc_driver_version=$gcc_BASEVER
+if test x$with_gcc_major_version_only = xyes ; then
+  gcc_driver_version=`echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
+fi
 cat > gcc-driver-name.h <<EOF
-#define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_BASEVER}${exeext}"
+#define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_driver_version}${exeext}"
 EOF
 
 # Check whether --enable-default-pie was given.


	Jakub