[gcc(refs/users/guojiufu/heads/personal-branch)] build: Use -include instead of conditional include.

[Jiu Fu Guo]

https://gcc.gnu.org/g:0164e59835de81d758fd4c56248ad7a46435fbfa

commit 0164e59835de81d758fd4c56248ad7a46435fbfa
Author: David Edelsohn <dje.gcc@gmail.com>
Date:   Mon Jun 22 21:27:18 2020 +0000

    build: Use -include instead of conditional include.
    
    Automake and GNU Make both use the endif keyword, which conflicts and
    elicits an error for matching if/ifdef and endif.
    
    This patch changes the conditional include to use "-include" to prevent
    a warning about a possible empty tmake_file.
    
    libgomp/ChangeLog
    
    2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
    
            * Makefile.am: Use -include.
            * Makefile.in: Regenerate.
    
    libatomic/ChangeLog
    
    2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
    
            * Makefile.am: Use -include.
            * Makefile.in: Regenerate.
    
    libstdc++-v3/ChangeLog
    
    2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
    
            * Makefile.am: Use -include.
            * Makefile.in: Regenerate.
    
    libgfortran/ChangeLog
    
    2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
    
            * Makefile.am: Use -include.
            * Makefile.in: Regenerate.

Diff:
---
 libatomic/Makefile.am    | 4 +---
 libatomic/Makefile.in    | 4 +---
 libgfortran/Makefile.am  | 4 +---
 libgfortran/Makefile.in  | 4 +---
 libgomp/Makefile.am      | 4 +---
 libgomp/Makefile.in      | 4 +---
 libstdc++-v3/Makefile.am | 4 +---
 libstdc++-v3/Makefile.in | 4 +---
 8 files changed, 8 insertions(+), 24 deletions(-)

diff --git a/libatomic/Makefile.am b/libatomic/Makefile.am
index f169d505227..f540d59992b 100644
--- a/libatomic/Makefile.am
+++ b/libatomic/Makefile.am
@@ -154,8 +154,6 @@ all-multi: $(libatomic_la_LIBADD)
 	$(MULTIDO) $(AM_MAKEFLAGS) DO=all multi-do # $(MAKE)
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 include $(top_srcdir)/../multilib.am
diff --git a/libatomic/Makefile.in b/libatomic/Makefile.in
index e8d47f28364..0a51bd55f01 100644
--- a/libatomic/Makefile.in
+++ b/libatomic/Makefile.in
@@ -864,9 +864,7 @@ all-multi: $(libatomic_la_LIBADD)
 	$(MULTIDO) $(AM_MAKEFLAGS) DO=all multi-do # $(MAKE)
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 # GNU Make needs to see an explicit $(MAKE) variable in the command it
 # runs to enable its job server during parallel builds.  Hence the
diff --git a/libgfortran/Makefile.am b/libgfortran/Makefile.am
index 69e94eea550..36b204e1aa3 100644
--- a/libgfortran/Makefile.am
+++ b/libgfortran/Makefile.am
@@ -1237,8 +1237,6 @@ endif
 EXTRA_DIST = $(m4_files)
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 include $(top_srcdir)/../multilib.am
diff --git a/libgfortran/Makefile.in b/libgfortran/Makefile.in
index 1de35db54be..fe063e7ff91 100644
--- a/libgfortran/Makefile.in
+++ b/libgfortran/Makefile.in
@@ -7192,9 +7192,7 @@ fpu-target.inc: fpu-target.h $(srcdir)/libgfortran.h
 @MAINTAINER_MODE_TRUE@	$(M4) -Dfile=$@ -I$(srcdir)/m4 misc_specifics.m4 > $@
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 # GNU Make needs to see an explicit $(MAKE) variable in the command it
 # runs to enable its job server during parallel builds.  Hence the
diff --git a/libgomp/Makefile.am b/libgomp/Makefile.am
index 16b69956949..586c930a4d7 100644
--- a/libgomp/Makefile.am
+++ b/libgomp/Makefile.am
@@ -142,8 +142,6 @@ CLEANFILES = $(STAMP_GENINSRC) $(STAMP_BUILD_INFO)
 MAINTAINERCLEANFILES = $(srcdir)/libgomp.info
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 include $(top_srcdir)/../multilib.am
diff --git a/libgomp/Makefile.in b/libgomp/Makefile.in
index 5455951cded..b570a942cff 100644
--- a/libgomp/Makefile.in
+++ b/libgomp/Makefile.in
@@ -1440,9 +1440,7 @@ stamp-build-info: libgomp.texi
 	@touch $@
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 # GNU Make needs to see an explicit $(MAKE) variable in the command it
 # runs to enable its job server during parallel builds.  Hence the
diff --git a/libstdc++-v3/Makefile.am b/libstdc++-v3/Makefile.am
index 62c2c324082..f11a13d274d 100644
--- a/libstdc++-v3/Makefile.am
+++ b/libstdc++-v3/Makefile.am
@@ -174,8 +174,6 @@ AM_MAKEFLAGS = \
 FLAGS_TO_PASS = $(AM_MAKEFLAGS)
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 include $(top_srcdir)/../multilib.am
diff --git a/libstdc++-v3/Makefile.in b/libstdc++-v3/Makefile.in
index e8987d45916..f5287248770 100644
--- a/libstdc++-v3/Makefile.in
+++ b/libstdc++-v3/Makefile.in
@@ -819,9 +819,7 @@ install-dvi:
 TAGS: tags-recursive $(LISP)
 
 # target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
+-include $(tmake_file)
 
 # GNU Make needs to see an explicit $(MAKE) variable in the command it
 # runs to enable its job server during parallel builds.  Hence the