X-Git-Url: https://git.draconx.ca/gitweb/dxcommon.git/blobdiff_plain/414e48faf73d99ea0242b13f3c22e64fb5adff64..2fa6f6881b22fe1aabb2d25ed6040fd8e8ddb3b5:/snippet/glconfig.mk

diff --git a/snippet/glconfig.mk b/snippet/glconfig.mk
index 0673817..42d024e 100644
--- a/snippet/glconfig.mk
+++ b/snippet/glconfig.mk
@@ -1,28 +1,26 @@
-# Copyright © 2011 Nick Bowler
+# Copyright © 2011-2013, 2019, 2021-2023 Nick Bowler
 #
 # Automake fragment to generate a Gnulib config header to rewrite exported
-# symbols.  This fragment relies on the Gnulib makefile enhancements done by
-# fix-gnulib.pl.  Furthermore, the following additional changes may be
+# symbols.  This fragment relies on the Gnulib makefile postprocessing done by
+# fix-gnulib.pl.  Furthermore, the following additions to configure.ac may be
 # required:
 #
-#   * Add AUTOMAKE_OPTIONS = nostdinc to Makefile.am (or equivalent).
-#   * Ensure that -I$(top_builddir)/@GLSRC@ and -I$(top_builddir) are
-#     listed in AM_CPPFLAGS (in that order).
-#   * Pass the desired symbol prefix to DX_FIX_GNULIB in configure.ac.
+#   * Add AM_PROC_CC_C_O to configure.ac
+#   * Pass the desired symbol prefix to DX_GLSYM_PREFIX in configure.ac,
+#     after including the fix-gnulib.pl output.
 #
 # License WTFPL2: Do What The Fuck You Want To Public License, version 2.
 # This is free software: you are free to do what the fuck you want to.
 # There is NO WARRANTY, to the extent permitted by law.
 
-GLCONFIG = @GLSRC@/config.h
+GLCONFIG = @GLSRC@/glconfig.h
 GLCAT    = cat /dev/null
 
-GLSYM_V   = $(GLSYM_V_$(V))
-GLSYM_V_  = $(GLSYM_V_$(AM_DEFAULT_VERBOSITY))
-GLSYM_V_0 = @echo "  GLSYM " $<;
+GLSYM_V   = $(GLSYM_V_@AM_V@)
+GLSYM_V_  = $(GLSYM_V_@AM_DEFAULT_V@)
+GLSYM_V_0 = @printf '  %$(DX_ALIGN_V)s %s\n' 'GLSYM   ' $<;
 
-gnulib_symfiles = $(gnulib_lt_objects:.lo=.glsym)
-gnulib_src_headers += $(GLCONFIG)
+gnulib_headers += $(GLCONFIG)
 
 # This suffix rule triggers symbol generation only on demand.  Dependencies are
 # not tracked directly, so it must remain phony and thus not create the target.
@@ -30,10 +28,10 @@ gnulib_src_headers += $(GLCONFIG)
 	$(GLSYM_V) $(MKDIR_P) $(@D)/.syms
 	$(AM_V_at) depfile=$(@D)/.syms/$(*F).deps \
 		source=$< object=$(GLCONFIG) $(CCDEPMODE) \
-		$(depcomp) $(COMPILE) -c -o $(@D)/.syms/$(*F).o $<
+		$(depcomp) $(COMPILE) -DNO_GLCONFIG \
+		-c -o $(@D)/.syms/$(*F).o $<
 	$(AM_V_at) $(SHELL) $(top_builddir)/exported.sh \
 		$(@D)/.syms/$(*F).o > $(@D)/.syms/$(*F).sym
-$(gnulib_symfiles): $(gnulib_core_headers)
 
 clean-local: clean-glconfig
 clean-glconfig:
@@ -45,38 +43,62 @@ clean-glconfig:
 	done
 .PHONY: clean-glconfig
 
+# Produce the list of all currently-enabled gnulib object files to assist with
+# external build helpers.
+GLCONFIG_OBJECTS = &1
+glconfig-objects:
+	@:; { \
+	  for f in $(gnulib_objects); do echo "$$f"; done; \
+	} >$(GLCONFIG_OBJECTS)
+.PHONY: glconfig-objects
+
 # The config header requires compilation of all gnulib object files via the
 # .glsym rule above.  However, it cannot depend on those build products
-# directly because those compilations will include this header if it exists,
-# which is (by definition) out of date when this rule gets triggered.
+# directly because they are phony, and would make this header never up-to-date.
 #
-# Thus, we delete the header, then perform a recursive make call to regenerate
-# the header, which can in turn parallelize the required compilation.
+# Thus, we use a recursive make call to regenerate the header, which avoids
+# the need to list prerequisites.
 #
-# Also delete the phony symbol files so the build doesn't fail badly if they
-# got created somehow (for instance by make -t).
-$(GLCONFIG): $(top_builddir)/config.h $(gnulib_core_headers)
-	-$(AM_V_at) rm -f $(gnulib_symfiles) $@.tmp $@
+# Since GNU make does not appear to allow the target of a suffix rule to be
+# marked .PHONY, we also delete the .glsym files here just in case they were
+# created for some reason (e.g., make -t).
+$(GLCONFIG): $(gnulib_core_headers)
+	-$(AM_V_at) rm -f $(gnulib_symfiles)
 	$(AM_V_at) $(MAKE) $(AM_MAKEFLAGS) glconfig-gen
-	$(AM_V_GEN) cat $(top_builddir)/config.h >> $@.tmp
-	$(AM_V_at) mv -f $@.tmp $@
+	$(AM_V_GEN) mv -f $@.tmp $@
 CLEANFILES += $(GLCONFIG)
 
 # The glconfig-gen target is intended only for use in recursive make
 # invocations.
 glconfig-gen: $(gnulib_symfiles)
+	$(AM_V_at) $(MKDIR_P) @GLSRC@
 	$(AM_V_at) depfiles=; symfiles=; \
 	for sym in $(gnulib_symfiles); do \
-		symdir=`expr "$$sym" : '\(.*/\)'`; \
-		symfile=`expr "$$sym" : '.*/\(.*\)' || printf '%s\n' "$$sym"`; \
-		symbase=$$symdir.syms/`expr "$$symfile" : '\(.*\)\..*'`; \
-		test -f "$$symbase.deps" && \
-			depfiles="$$depfiles $$symbase.deps"; \
-		symfiles="$$symfiles $$symbase.sym"; \
+	  symdir=`expr "$$sym" : '\(.*/\)'`; \
+	  symfile=`expr "$$sym" : '.*/\(.*\)' || printf '%s\n' "$$sym"`; \
+	  symbase=$$symdir.syms/`expr "$$symfile" : '\(.*\)\..*'`; \
+	  test -f "$$symbase.deps" && \
+	    depfiles="$$depfiles $$symbase.deps"; \
+	    symfiles="$$symfiles $$symbase.sym"; \
 	done; \
-		$(GLCAT) $$depfiles > @GLSRC@/$(DEPDIR)/glconfig.Ph && \
-		$(GLCAT) $$symfiles | sed 's/.*/#define & $(GLSYM_PREFIX)&/' \
-			> $(GLCONFIG).tmp
+	$(glconfig_nodeps) \
+	  || $(GLCAT) $$depfiles > @GLSRC@/$(DEPDIR)/glconfig.Ph || exit; \
+	$(GLCAT) $$symfiles | sed 's/.*/#define & $(GLSYM_PREFIX)&/' \
+	  >$(GLCONFIG).tmp
 .PHONY: glconfig-gen
 
-@AMDEP_TRUE@@am__include@ @am__quote@@GLSRC@/$(DEPDIR)/glconfig.Ph@am__quote@
+if AMDEP
+glconfig_nodeps = false
+@am__include@ @am__quote@@GLSRC@/$(DEPDIR)/glconfig.Ph@am__quote@@dx_include_marker@
+else
+glconfig_nodeps = true
+endif
+
+# Automake 1.16 and newer use make rules to generate the dependency stubs.
+# we must hook those which is kind of annoying to do.  This should be harmless
+# on previous versions which generate the stubs directly in config.status.
+@dx_depfiles_target@: @GLSRC@/$(DEPDIR)/glconfig.Ph
+@GLSRC@/$(DEPDIR)/glconfig.Ph:
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && mv -f $@-t $@
+DISTCLEANFILES += @GLSRC@/$(DEPDIR)/glconfig.Ph