build: Do cmake, pc, and profile variable replacements in Makefile

Keeps install dirs and corresponding variables better in sync.

Closes #198

Makefile.am

@@ -15,10 +15,16 @@ cmakeconfigdir = $(datadir)/cmake/$(PACKAGE)/
 cmakeconfig_DATA = bash-completion-config.cmake \
                    bash-completion-config-version.cmake
 
-bash_completion.sh: bash_completion.sh.in Makefile
-	sed -e 's|@pkgdatadir[@]|$(pkgdatadir)|' <$(srcdir)/$@.in >$@
+%: %.in Makefile
+	sed \
+		-e 's|@prefix[@]|$(prefix)|' \
+		-e 's|@compatdir[@]|$(compatdir)|' \
+		-e 's|@pkgdatadir[@]|$(pkgdatadir)|' \
+		-e 's|@VERSION[@]|$(VERSION)|' \
+		<$(srcdir)/$@.in >$@
 
-CLEANFILES = bash_completion.sh bash-completion.pc
+CLEANFILES = bash_completion.sh bash-completion.pc \
+	bash-completion-config.cmake bash-completion-config-version.cmake
 
 EXTRA_DIST = CHANGES $(pkgdata_DATA) bash_completion.sh.in .dir-locals.el \
 	.editorconfig README.md CONTRIBUTING.md
@@ -28,9 +34,4 @@ install-data-hook:
 	sed -e 's|-/etc/bash_completion\.d|-$(compatdir)|' \
 	    $(DESTDIR)$(pkgdatadir)/bash_completion > $$tmpfile && \
 	cat $$tmpfile > $(DESTDIR)$(pkgdatadir)/bash_completion && \
-	sed -e 's|\$${prefix}|$(prefix)|' \
-	    $(DESTDIR)$(datadir)/cmake/$(PACKAGE)/bash-completion-config.cmake \
-	         > $$tmpfile && \
-	cat $$tmpfile > \
-	    $(DESTDIR)$(datadir)/cmake/$(PACKAGE)/bash-completion-config.cmake && \
 	rm $$tmpfile

bash-completion-config.cmake.in

@@ -5,7 +5,7 @@ set (BASH_COMPLETION_VERSION "@VERSION@")
 
 set (BASH_COMPLETION_PREFIX "@prefix@")
 set (BASH_COMPLETION_COMPATDIR "@compatdir@")
-set (BASH_COMPLETION_COMPLETIONSDIR "@datarootdir@/@PACKAGE@/completions")
-set (BASH_COMPLETION_HELPERSDIR "@datarootdir@/@PACKAGE@/helpers")
+set (BASH_COMPLETION_COMPLETIONSDIR "@pkgdatadir@/completions")
+set (BASH_COMPLETION_HELPERSDIR "@pkgdatadir@/helpers")
 
 set (BASH_COMPLETION_FOUND "TRUE")

bash-completion.pc.in

@@ -1,7 +1,7 @@
 prefix=@prefix@
 compatdir=@compatdir@
-completionsdir=@datarootdir@/@PACKAGE@/completions
-helpersdir=@datarootdir@/@PACKAGE@/helpers
+completionsdir=@pkgdatadir@/completions
+helpersdir=@pkgdatadir@/helpers
 
 Name: bash-completion
 Description: programmable completion for the bash shell

configure.ac

@@ -1,6 +1,6 @@
 AC_PREREQ([2.60])
 AC_INIT([bash-completion], [2.8])
-AM_INIT_AUTOMAKE([foreign dist-xz no-dist-gzip -Wall -Werror])
+AM_INIT_AUTOMAKE([foreign dist-xz no-dist-gzip -Wall -Wno-portability -Werror])
 AC_PROG_LN_S
 AC_PROG_MKDIR_P
 AC_SUBST(compatdir, $sysconfdir/bash_completion.d)
@@ -10,8 +10,5 @@ completions/Makefile
 doc/Makefile
 helpers/Makefile
 test/Makefile
-bash-completion.pc
-bash-completion-config.cmake
-bash-completion-config-version.cmake
 ])
 AC_OUTPUT