Added API and Makefile rules for share/ files

.gitignore

@@ -16,3 +16,4 @@
 /yosys-filterlib
 /yosys-svgviewer
 /kernel/version_*.cc
+/share

Makefile

@@ -106,6 +106,8 @@ test: yosys
 
 install: $(TARGETS)
 	install $(TARGETS) /usr/local/bin/
+	mkdir -p /usr/local/share/yosys
+	cp -r share/. /usr/local/share/yosys/.
 
 install-abc:
 	install yosys-abc /usr/local/bin/
@@ -114,6 +116,7 @@ manual:
 	cd manual && bash make.sh
 
 clean:
+	rm -rf share
 	rm -f $(OBJS) $(GENFILES) $(TARGETS)
 	rm -f kernel/version_*.o kernel/version_*.cc
 	rm -f libs/*/*.d frontends/*/*.d passes/*/*.d backends/*/*.d kernel/*.d

kernel/driver.cc

@@ -421,6 +421,27 @@ std::string rewrite_yosys_exe(std::string exe)
 	return exe;
 }
 
+std::string get_share_file_name(std::string file)
+{
+	char buffer[1024];
+	ssize_t buflen = readlink("/proc/self/exe", buffer, sizeof(buffer)-1);
+
+	if (buflen < 0)
+		log_error("Can't find file `%s': reading of /proc/self/exe failed!\n", file.c_str());
+
+	buffer[buflen] = 0;
+
+	std::string newfile_inplace = stringf("%s/share/%s", dirname(buffer), file.c_str());
+	if (access(newfile_inplace.c_str(), F_OK) == 0)
+		return newfile_inplace;
+
+	std::string newfile_system = stringf("%s/../share/yosys/%s", dirname(buffer), file.c_str());
+	if (access(newfile_system.c_str(), F_OK) == 0)
+		return newfile_system;
+
+	log_error("Can't find file `%s': no `%s' and no `%s' found!\n", file.c_str(), newfile_inplace.c_str(), newfile_system.c_str());
+}
+
 int main(int argc, char **argv)
 {
 	std::string frontend_command = "auto";

kernel/register.h

@@ -34,6 +34,7 @@ extern Tcl_Interp *yosys_get_tcl_interp();
 // implemented in driver.cc
 extern RTLIL::Design *yosys_get_design();
 std::string rewrite_yosys_exe(std::string exe);
+std::string get_share_file_name(std::string file);
 
 struct Pass
 {