d: respect --enable-link-mutex configure option
I noticed the option is ignored because @DO_LINK_MUTEX@
is not defined in d/Make-lang.in.
gcc/ChangeLog:
* Makefile.in: Set DO_LINK_MUTEX.
gcc/d/ChangeLog:
* Make-lang.in: Use it as $DO_LINK_MUTEX.
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 5ad638f..c57d622 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -272,6 +272,7 @@
NO_PIE_CFLAGS = @NO_PIE_CFLAGS@
NO_PIE_FLAG = @NO_PIE_FLAG@
+DO_LINK_MUTEX = @DO_LINK_MUTEX@
# We don't want to compile the compilers with -fPIE, it make PCH fail.
COMPILER += $(NO_PIE_CFLAGS)
diff --git a/gcc/d/Make-lang.in b/gcc/d/Make-lang.in
index 6f9b2e5..984b1d6 100644
--- a/gcc/d/Make-lang.in
+++ b/gcc/d/Make-lang.in
@@ -70,7 +70,7 @@
DLINKER = $(GDC) $(NO_PIE_FLAG) -lstdc++
# Like LINKER, but use a mutex for serializing front end links.
-ifeq (@DO_LINK_MUTEX@,true)
+ifeq ($(DO_LINK_MUTEX),true)
DLLINKER = $(SHELL) $(srcdir)/lock-and-run.sh linkfe.lck $(DLINKER)
else
DLLINKER = $(DLINKER)
