Makefile.am: avoid POSIX-incompatible pattern rules.

This is to fix building with bmake on FreeBSD.

Replace all pattern rules with POSIX-compatible suffix rules. As the latter are
much less flexible than pattern rules, this required creating copies or symlinks
with appropriate names for source files that don't fit into the naming scheme
implied by suffix rules.

Also, dependencies on custom build scripts had to be dropped, as suffix rules
don't allow additional prerequisites.

Makefile.am

@@ -208,9 +208,7 @@ re2c_BOOT = \
 	bootstrap/src/parse/conf_parser.cc
 
 # custom sources
-re2c_CUSTOM_HELP = doc/help.rst
 re2c_CUSTOM = \
-	$(re2c_CUSTOM_HELP) \
 	src/msg/ver_to_vernum.re \
 	src/options/parse_opts.re \
 	src/parse/lexer.re \
@@ -219,7 +217,6 @@ re2c_CUSTOM = \
 	src/parse/conf_parser.ypp
 
 # docs
-re2c_SRC_DOC = doc/manpage.rst
 # To build the list of examples for all backends, run:
 # find examples -regex '.*\.re\|.*\(state\|01_basic\|definitions\)\..*' -printf '\t%p \\\n' | sort
 re2c_SRC_DOC_EXT = \
@@ -569,6 +566,7 @@ if WITH_ZIG
 DOCS += doc/re2zig.1
 HELP += src/msg/help_re2zig.cc
 endif
+BUILT_SOURCES += $(HELP)
 
 man_MANS = $(DOCS)
 
@@ -625,13 +623,13 @@ CLEANFILES = \
 if REBUILD_SYNTAX
 STX2CPP = $(top_srcdir)/build/stx2cpp.py
 # generate C++ sources from syntax configs and update bootstrap files
-src/default_syntax_%.cc : $(top_srcdir)/include/syntax/% $(STX2CPP)
+.stx.cc:
 	$(AM_V_at)$(MKDIR_P) $(@D)
 	$(AM_V_GEN)$(PYTHON) $(STX2CPP) $< $@
 	$(AM_V_GEN)cp -f $@ $(top_srcdir)/bootstrap/$@
 else
 # copy bootstrap files
-src/default_syntax_%.cc : bootstrap/src/default_syntax_%.cc
+.stx.cc:
 	$(AM_V_at)$(MKDIR_P) $(@D)
 	$(AM_V_GEN)cp $(top_srcdir)/bootstrap/$@ $(@D)
 	$(AM_V_at)echo "Reconfigure with --enable-syntax to regenerate $@"
@@ -677,32 +675,31 @@ bootstrap: all
 
 .PHONY: docs
 if REBUILD_DOCS
-docs: $(DOCS) $(HELP)
 RST2TXT = $(top_srcdir)/build/rst2txt.py
 RST2MAN = $(top_srcdir)/build/rst2man.py
 SPLITMAN = $(top_srcdir)/build/split_man.py
+docs: $(DOCS) $(HELP) $(SPLITMAN) $(RST2MAN) $(RST2TXT)
 # generate manpage
-doc/re2%.1: $(re2c_SRC_DOC) $(re2c_SRC_DOC_EXT) $(SPLITMAN) $(RST2MAN)
+.rst.1:
 	$(AM_V_at)$(MKDIR_P) $(@D)
-	$(AM_V_GEN)$(PYTHON) $(SPLITMAN) $(top_builddir)/$(re2c_SRC_DOC) $(top_builddir)/$@.rst \
-		&& $(PYTHON) $(RST2MAN) --tab-width=4 $(top_builddir)/$@.rst > $@ \
-		&& cp $@ $(top_srcdir)/bootstrap/$@ \
-		&& rm $(top_builddir)/$@.rst
+	$(AM_V_GEN)$(PYTHON) $(SPLITMAN) $(top_builddir)/$< $(top_builddir)/$< \
+		&& $(PYTHON) $(RST2MAN) --tab-width=4 $(top_builddir)/$< > $@ \
+		&& cp $@ $(top_srcdir)/bootstrap/$@
 # generate help
-src/msg/help_re2%.cc: $(re2c_CUSTOM_HELP) $(re2c_SRC_DOC_EXT) $(RST2TXT)
+.rst.cc:
 	$(AM_V_at)$(MKDIR_P) $(@D)
-	$(AM_V_GEN)$(PYTHON) $(SPLITMAN) $(top_builddir)/$(re2c_CUSTOM_HELP) $(<D)/$(@F).rst \
-		&& $(PYTHON) $(RST2TXT) --variable-name=help $(<D)/$(@F).rst $@ \
+	$(AM_V_GEN)$(PYTHON) $(SPLITMAN) $(top_builddir)/$< $(top_builddir)/$< \
+		&& $(PYTHON) $(RST2TXT) --variable-name=help $(top_builddir)/$< $@ \
 		&& cp $@ $(top_srcdir)/bootstrap/$@
 else
 docs: $(DOCS) $(HELP)
 	$(AM_V_at)echo "Reconfigure with --enable-docs to rebuild docs"
 # copy bootstrap manpage
-doc/re2%.1: bootstrap/doc/re2%.1
+.rst.1:
 	$(AM_V_at)$(MKDIR_P) $(@D)
 	$(AM_V_GEN)cp $(top_srcdir)/bootstrap/$@ $@
 # copy bootstrap help
-src/msg/help_re2%.cc: $(top_srcdir)/bootstrap/src/msg/help_re2%.cc
+.rst.cc:
 	$(AM_V_at)$(MKDIR_P) $(@D)
 	$(AM_V_GEN)cp $(top_srcdir)/bootstrap/$@ $@
 endif

build/stx2cpp.py

@@ -15,8 +15,9 @@
 output = sys.argv[2]
 
 with open(output, 'w') as output_file:
+    name = os.path.splitext(os.path.basename(input))[0].upper()
     output_file.write("#include \"src/parse/conf_parser.h\"\n")
-    output_file.write("const char* DEFAULT_SYNTAX_" + os.path.basename(input).upper() + " =\n")
+    output_file.write("const char* " + name + " =\n")
 
     # write input file line by line as a string, escaping characters as needed
     with open(input, 'r') as input_file:

configure.ac

@@ -206,18 +206,59 @@ AC_CONFIG_FILES([
     benchmarks/submatch_dfa_aot/Makefile
     benchmarks/submatch_dfa_jit/Makefile
     benchmarks/submatch_java/Makefile
-    doc/manpage.rst
-    doc/help.rst
 ])
 AC_CONFIG_FILES([run_tests.py],
     [chmod +x run_tests.py])
 AC_CONFIG_FILES([benchmarks/submatch_dfa_aot/run.py],
     [chmod +x benchmarks/submatch_dfa_aot/run.py])
 AC_CONFIG_FILES([benchmarks/submatch_java/run.py],
     [chmod +x benchmarks/submatch_java/run.py])
-
-
-AC_CONFIG_LINKS([benchmarks/submatch_java/chart.js:benchmarks/submatch_java/chart.js])
+# Custom names are needed to accommodate POSIX Make suffix rules (bmake in
+# particular) instead of the more generic and flexible GNU Make pattern rules.
+# Copies are needed to patch them in-place with build/split_man.py.
+AC_CONFIG_FILES([
+    src/msg/help_re2c.rst:doc/help.rst.in
+    src/msg/help_re2d.rst:doc/help.rst.in
+    src/msg/help_re2go.rst:doc/help.rst.in
+    src/msg/help_re2hs.rst:doc/help.rst.in
+    src/msg/help_re2java.rst:doc/help.rst.in
+    src/msg/help_re2js.rst:doc/help.rst.in
+    src/msg/help_re2ocaml.rst:doc/help.rst.in
+    src/msg/help_re2py.rst:doc/help.rst.in
+    src/msg/help_re2rust.rst:doc/help.rst.in
+    src/msg/help_re2v.rst:doc/help.rst.in
+    src/msg/help_re2zig.rst:doc/help.rst.in
+
+    doc/re2c.rst:doc/manpage.rst.in
+    doc/re2d.rst:doc/manpage.rst.in
+    doc/re2go.rst:doc/manpage.rst.in
+    doc/re2hs.rst:doc/manpage.rst.in
+    doc/re2java.rst:doc/manpage.rst.in
+    doc/re2js.rst:doc/manpage.rst.in
+    doc/re2ocaml.rst:doc/manpage.rst.in
+    doc/re2py.rst:doc/manpage.rst.in
+    doc/re2rust.rst:doc/manpage.rst.in
+    doc/re2v.rst:doc/manpage.rst.in
+    doc/re2zig.rst:doc/manpage.rst.in
+])
+# Custom names are needed to accommodate POSIX Make suffix rules (bmake in
+# particular) instead of the more generic and flexible GNU Make pattern rules.
+AC_CONFIG_LINKS([
+    src/default_syntax_c.stx:include/syntax/c
+    src/default_syntax_d.stx:include/syntax/d
+    src/default_syntax_go.stx:include/syntax/go
+    src/default_syntax_haskell.stx:include/syntax/haskell
+    src/default_syntax_java.stx:include/syntax/java
+    src/default_syntax_js.stx:include/syntax/js
+    src/default_syntax_ocaml.stx:include/syntax/ocaml
+    src/default_syntax_python.stx:include/syntax/python
+    src/default_syntax_rust.stx:include/syntax/rust
+    src/default_syntax_v.stx:include/syntax/v
+    src/default_syntax_zig.stx:include/syntax/zig
+])
+AC_CONFIG_LINKS([
+    benchmarks/submatch_java/chart.js:benchmarks/submatch_java/chart.js
+])
 
 
 LT_INIT([dlopen win32-dll])