[PATCH] gcc/m2: Drop references to $(P)

["Arsen Arsenović" <arsen@aarsen.me>]

$(P) seems to have been a workaround for some old, proprietary make
implementations that we no longer support.  It was removed in
r0-31149-gb8dad04b688e9c.

gcc/m2/ChangeLog:

	* Make-lang.in: Remove references to $(P).
	* Make-maintainer.in: Ditto.
---
Hi,

We spotted that the m2 makefile includes some long-gone compatibility
variable $(P), presumably left over from when m2 was not in the tree
yet.  This induced a build failure on our end:
https://bugs.gentoo.org/904714

Build-tested on x86_64-pc-linux-gnu.  I haven't finished running the
testsuite.  I believe this only ever expands to an empty string (if not
set by the env) in the current build system, so in theory, it should be
safe.

OK for gcc-13 and trunk (with a priority on the former)?

 gcc/m2/Make-lang.in       | 4 ++--
 gcc/m2/Make-maintainer.in | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/m2/Make-lang.in b/gcc/m2/Make-lang.in
index b34db0d9156..d0fa692e5b8 100644
--- a/gcc/m2/Make-lang.in
+++ b/gcc/m2/Make-lang.in
@@ -514,7 +514,7 @@ GM2_LIBS_BOOT     = m2/gm2-compiler-boot/gm2.a \
 cc1gm2$(exeext): m2/stage1/cc1gm2$(exeext) $(m2.prev)
 	cp -p $< $@
 
-m2/stage2/cc1gm2$(exeext): m2/stage1/cc1gm2$(exeext) m2/gm2-compiler/m2flex.o $(P) \
+m2/stage2/cc1gm2$(exeext): m2/stage1/cc1gm2$(exeext) m2/gm2-compiler/m2flex.o \
                             $(GM2_C_OBJS) $(BACKEND) $(LIBDEPS) $(GM2_LIBS) \
                             m2/gm2-gcc/rtegraph.o plugin/m2rte$(soext)
 	-test -d $(@D) || $(mkinstalldirs) $(@D)
@@ -527,7 +527,7 @@ m2/stage2/cc1gm2$(exeext): m2/stage1/cc1gm2$(exeext) m2/gm2-compiler/m2flex.o $(
 	@$(call LINK_PROGRESS,$(INDEX.m2),end)
 
 m2/stage1/cc1gm2$(exeext): gm2$(exeext) m2/gm2-compiler-boot/m2flex.o \
-                            $(P) $(GM2_C_OBJS) $(BACKEND) $(LIBDEPS) \
+                            $(GM2_C_OBJS) $(BACKEND) $(LIBDEPS) \
                             $(GM2_LIBS_BOOT) $(MC_LIBS) \
                             m2/gm2-gcc/rtegraph.o plugin/m2rte$(soext) \
                             $(m2.prev)
diff --git a/gcc/m2/Make-maintainer.in b/gcc/m2/Make-maintainer.in
index 17bd9a2d37e..a70682673cd 100644
--- a/gcc/m2/Make-maintainer.in
+++ b/gcc/m2/Make-maintainer.in
@@ -753,7 +753,7 @@ GM2_LIBS_PARANOID = m2/gm2-compiler-paranoid/gm2.a \
 gm2.paranoid: m2/m2obj3/cc1gm2$(exeext) gm2.verifyparanoid
 
 m2/m2obj3/cc1gm2$(exeext): m2/m2obj2/cc1gm2$(exeext) m2/gm2-compiler-paranoid/m2flex.o \
-                            $(P) $(GM2_C_OBJS) $(BACKEND) $(LIBDEPS) $(GM2_LIBS_PARANOID) \
+                            $(GM2_C_OBJS) $(BACKEND) $(LIBDEPS) $(GM2_LIBS_PARANOID) \
                             m2/gm2-gcc/rtegraph.o plugin/m2rte$(exeext).so m2/gm2-libs-boot/M2LINK.o
 	-test -d m2/m2obj3 || $(mkinstalldirs) m2/m2obj3
 	@$(call LINK_PROGRESS,$(INDEX.m2),start)
-- 
2.40.0