make - fallback to simpler git describe if able

Author: jeremylt

Makefile

@@ -456,6 +456,11 @@ info:
 	$(info pkgconfigdir  = $(value pkgconfigdir))
 	$(info )
 	$(info -----------------------------------------)
+	$(info )
+	$(info Git:)
+	$(info describe      = $(GIT_DESCRIBE))
+	$(info )
+	$(info -----------------------------------------)
 	@true
 
 info-backends:
@@ -850,10 +855,11 @@ $(OBJDIR)/ceed.pc : pkgconfig-prefix = $(prefix)
 	    -e "s:%prefix%:$(pkgconfig-prefix):" \
 	    -e "s:%libs_private%:$(pkgconfig-libs-private):" $< > $@
 
-GIT_DESCRIBE = $(shell git describe --dirty || printf "unknown\n")
+GIT_DESCRIBE = $(shell git describe --always --dirty 2>/dev/null || printf "unknown\n")
 
 $(OBJDIR)/interface/ceed-config.c: Makefile
 	@$(file >$@,#include <ceed-impl.h>) \
+	$(file >>$@,) \
 	$(file >>$@,int CeedGetGitVersion(const char **git_version) {) \
   $(file >>$@,  *git_version = "$(GIT_DESCRIBE)";) \
 	$(file >>$@,  return 0;) \

tests/t010-config.c

@@ -8,7 +8,7 @@ int main(int argc, char **argv) {
   const char *git_version, *build_config;
   CeedGetGitVersion(&git_version);
   CeedGetBuildConfiguration(&build_config);
-  // printf("Git: %s\n", git_version);
-  // puts(build_config);
+  //printf("Git: %s\n", git_version);
+  //puts(build_config);
   return 0;
 }