build your config w/o fancy sed (#43)

Makefile.am

@@ -20,3 +20,14 @@ pm_shaders__DATA = src/libprojectM/Renderer/blur.cg \
 install-data-local:
 	test -z $(pkgdatadir) || $(MKDIR_P) $(pm_presets_dir)
 	find "$(PRESETSDIR)" -type f -exec $(INSTALL_DATA) {} $(pm_presets_dir) \;
+
+# from https://stackoverflow.com/questions/30897170/ac-subst-does-not-expand-variable answer: https://stackoverflow.com/a/30960268
+# ptomato https://stackoverflow.com/users/172999/ptomato 
+
+src/libprojectM/config.inp: src/libprojectM/config.inp.in Makefile
+	$(AM_V_GEN)rm -f $@ $@.tmp && \
+	$(SED) -e "s,%datadir%,$(datadir),"g  $< >$@.tmp && \
+	chmod a-w $@.tmp && \
+	mv $@.tmp $@
+
+CLEANFILES += src/libprojectM/config.inp

configure.ac

@@ -32,9 +32,14 @@ AC_CONFIG_FILES([
   src/libprojectM/NativePresetFactory/Makefile
   src/libprojectM/MilkdropPresetFactory/Makefile
 ])
-dnl FIXME
-dnl AC_CONFIG_FILES([src/libprojectM/config.inp],
-dnl [cat src/libprojectM/config.inp | sed -e"s,\${prefix},$prefix," > src/libprojectM/config.inp.b])
+
+dnl from https://stackoverflow.com/questions/30897170/ac-subst-does-not-expand-variable answer: https://stackoverflow.com/a/30960268
+dnl ptomato https://stackoverflow.com/users/172999/ptomato 
+
+AC_SUBST([PACKAGE])
+AC_PROG_SED
+AC_CONFIG_FILES([src/libprojectM/config.inp.in])
+
 
 AC_PREFIX_DEFAULT([/usr/local])
 

src/libprojectM/config.inp.in.in

@@ -16,6 +16,6 @@ Easter Egg Parameter = 1
 Hard Cut Sensitivity = 10       # Lower to make hard cuts more frequent
 Aspect Correction = true	# Custom Shape Aspect Correction
 
-Preset Path = @datarootdir@/presets # preset location
+Preset Path = %datadir%/@PACKAGE@/presets # preset location
 Title Font = Vera.ttf
 Menu Font = VeraMono.ttf