X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/c9cfa678c1bc391d0c270df6fdab7e9d50949b1f..645fcce0830342b644cc16e71e28790c838d9415:/vars.am

diff --git a/vars.am b/vars.am
index 56502879..41f57a49 100644
--- a/vars.am
+++ b/vars.am
@@ -27,11 +27,6 @@
 ###--------------------------------------------------------------------------
 ### Miscellaneous useful definitions.
 
-## Some convenient abbreviations for file suffixes.
-e			 = $(EXEEXT)
-o			 = $(OBJEXT)
-t			 = t$e
-
 ## Installation directories.
 archincludedir		 = $(pkglibdir)/include
 
@@ -113,13 +108,26 @@ AM_CPPFLAGS		 = $(CATACOMB_INCLUDES)
 ###--------------------------------------------------------------------------
 ### Testing.
 
-SUFFIXES		+= .c .$t .to
+TEST_EXTENSIONS		 = .t
+SUFFIXES		+= .c .t$(EXEEXT) .to
+
+## This unpleasant duplication of rules makes the build system basically work
+## for non-GNU make(1) variants, while GNU Make will associate useful
+## additional dependencies with the test programs.  GNU Make seems not to
+## mind the duplicate rules, and uses the second (better) set; non-GNU Make
+## will think the second set refer to bizarrely-named targets which nobody is
+## apparently interested in.
 .c.to:
 	$(AM_V_CC)$(COMPILE) -c -DTEST_RIG -DSRCDIR=\"$(srcdir)\" $< -o $@
-.to.$t:
+.to.t$(EXEEXT):
 	$(AM_V_CCLD)$(LINK) $< $(TEST_LIBS) $(top_builddir)/libcatacomb.la \
 		$(mLib_LIBS) $(CATACOMB_LIBS) $(LIBS)
-.PRECIOUS: %.to
-CLEANFILES		+= *.to *.$t
+%.to: %.c %.lo
+	$(AM_V_CC)$(COMPILE) -c -DTEST_RIG -DSRCDIR=\"$(srcdir)\" $< -o $@
+%.t$(EXEEXT): %.to $(TEST_LIBS) $(top_builddir)/libcatacomb.la
+	$(AM_V_CCLD)$(LINK) $+ $(mLib_LIBS) $(CATACOMB_LIBS) $(LIBS)
+
+.PRECIOUS: %.to %.t$(EXEEXT)
+CLEANFILES		+= *.to *.t$(EXEEXT)
 
 ###----- That's all, folks --------------------------------------------------