gprofng: 30894 bison should be no hard dependency

[binutils-gdb.git] / gprofng / src / Makefile.am

diff --git a/gprofng/src/Makefile.am b/gprofng/src/Makefile.am
index 219367fb9ce364df578f27cb44e8da7334cce7ee..20c8b0022e4fff9bb0472d495baea52e55bab615 100644 (file)
--- a/gprofng/src/Makefile.am
+++ b/gprofng/src/Makefile.am
@@ -117,12 +117,25 @@ AM_CFLAGS = $(GPROFNG_CFLAGS) $(PTHREAD_CFLAGS) \
        $(GPROFNG_NO_SWITCH_CFLAGS)
 AM_CXXFLAGS = $(AM_CFLAGS)
 
-QLParser.tab.cc QLParser.tab.hh: QLParser.yy
+# bison generates two files QLParser.tab.cc, QLParser.tab.hh.
+# we don't know which file will be newer.
+# Make QLParser.tab.cc always newer than QLParser.tab.hh.
+QLParser.tab.hh: QLParser.yy
+       if test "$(BISON)" = ":"; then \
+         echo "fatal: Building gprofng requires bison 3.0.4 or later."; \
+         exit 1; \
+       fi; \
        $(BISON) $^
 
-BUILT_SOURCES = QLParser.tab.hh
-EXTRA_DIST = QLParser.yy
+QLParser.tab.cc: QLParser.tab.hh
+       touch $@
 
+BUILT_SOURCES = QLParser.tab.cc QLParser.tab.hh
+EXTRA_DIST = QLParser.tab.cc QLParser.tab.hh QLParser.yy
+
+# info and diststuff are needed for src-release.sh:
+info: $(BUILT_SOURCES)
+diststuff: info
 
 lib_LTLIBRARIES = $(LIBGPROFNG)
 libgprofng_la_SOURCES = $(CCSOURCES) $(CSOURCES)