[PATCH 25/45] Add D front-end, libphobos library, and D2 testsuite.

["Arsen Arsenović" <arsen@aarsen.me>]

From: Iain Buclaw <ibuclaw@gcc.gnu.org>

ChangeLog:

	* config-ml.in: Treat GDC and GDCFLAGS like other compiler/flag
	environment variables.

config/ChangeLog:

	* multi.m4: Set GDC.

Cherry picked from GCC commit b4c522fabd0df7be08882d2207df8b2765026110
---
 ChangeLog        | 24 ++++++++++++++++++++++++
 config-ml.in     | 16 +++++++++++++++-
 config/ChangeLog |  4 ++++
 3 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 356ac165782..c817c1d702d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,27 @@
+2018-10-28  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* Makefile.def (target_modules): Add libphobos.
+	(flags_to_pass): Add GDC, GDCFLAGS, GDC_FOR_TARGET and
+	GDCFLAGS_FOR_TARGET.
+	(dependencies): Make libphobos depend on libatomic, libbacktrace
+	configure, and zlib configure.
+	(language): Add language d.
+	* Makefile.in: Rebuild.
+	* Makefile.tpl (BUILD_EXPORTS): Add GDC and GDCFLAGS.
+	(HOST_EXPORTS): Add GDC.
+	(POSTSTAGE1_HOST_EXPORTS): Add GDC and GDC_FOR_BUILD.
+	(BASE_TARGET_EXPORTS): Add GDC.
+	(GDC_FOR_BUILD, GDC, GDCFLAGS): New variables.
+	(GDC_FOR_TARGET, GDC_FLAGS_FOR_TARGET): New variables.
+	(EXTRA_HOST_FLAGS): Add GDC.
+	(STAGE1_FLAGS_TO_PASS): Add GDC.
+	(EXTRA_TARGET_FLAGS): Add GDC and GDCFLAGS.
+	* config-ml.in: Treat GDC and GDCFLAGS like other compiler/flag
+	environment variables.
+	* configure: Rebuild.
+	* configure.ac: Add target-libphobos to target_libraries.  Set and
+	substitute GDC_FOR_BUILD and GDC_FOR_TARGET.
+
 2023-07-03  Nick Clifton  <nickc@redhat.com>
 
 	2.41 Branch Point.
diff --git a/config-ml.in b/config-ml.in
index 9177fe63fbb..1c66748b65f 100644
--- a/config-ml.in
+++ b/config-ml.in
@@ -510,6 +510,7 @@ multi-do:
 				prefix="$(prefix)" \
 				exec_prefix="$(exec_prefix)" \
 				GOCFLAGS="$(GOCFLAGS) $${flags}" \
+				GDCFLAGS="$(GDCFLAGS) $${flags}" \
 				CXXFLAGS="$(CXXFLAGS) $${flags}" \
 				LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
 				LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
@@ -741,7 +742,7 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
         break
       fi
     done
-    ml_config_env='CC="${CC_}$flags" CXX="${CXX_}$flags" F77="${F77_}$flags" GFORTRAN="${GFORTRAN_}$flags" GOC="${GOC_}$flags"'
+    ml_config_env='CC="${CC_}$flags" CXX="${CXX_}$flags" F77="${F77_}$flags" GFORTRAN="${GFORTRAN_}$flags" GOC="${GOC_}$flags" GDC="${GDC_}$flags"'
 
     if [ "${with_target_subdir}" = "." ]; then
 	CC_=$CC' '
@@ -749,6 +750,7 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
 	F77_=$F77' '
 	GFORTRAN_=$GFORTRAN' '
 	GOC_=$GOC' '
+	GDC_=$GDC' '
     else
 	# Create a regular expression that matches any string as long
 	# as ML_POPDIR.
@@ -813,6 +815,18 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
 	  esac
 	done
 
+	GDC_=
+	for arg in ${GDC}; do
+	  case $arg in
+	  -[BIL]"${ML_POPDIR}"/*)
+	    GDC_="${GDC_}"`echo "X${arg}" | sed -n "s/X\\(-[BIL]${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X-[BIL]${popdir_rx}\\(.*\\)/\\1/p"`' ' ;;
+	  "${ML_POPDIR}"/*)
+	    GDC_="${GDC_}"`echo "X${arg}" | sed -n "s/X\\(${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X${popdir_rx}\\(.*\\)/\\1/p"`' ' ;;
+	  *)
+	    GDC_="${GDC_}${arg} " ;;
+	  esac
+	done
+
 	if test "x${LD_LIBRARY_PATH+set}" = xset; then
 	  LD_LIBRARY_PATH_=
 	  for arg in `echo "$LD_LIBRARY_PATH" | tr ':' ' '`; do
diff --git a/config/ChangeLog b/config/ChangeLog
index d14ec0f9a82..3a9a577afc1 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,7 @@
+2018-10-28  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* multi.m4: Set GDC.
+
 2022-12-31  Nick Clifton  <nickc@redhat.com>
 
 	* 2.40 branch created.
-- 
2.41.0