From 7517d207f55baf6955184ea0f24ae38b068861a6 Mon Sep 17 00:00:00 2001 From: Andre Noll Date: Tue, 22 May 2012 17:55:10 +0200 Subject: [PATCH] Allow to build a static version of libosl. This adds the new target libosl.a which creates an archive that can be statically linked into applications. Currently this works only on ELF-based systems including Linux, FreeBSD and NetBSD, but fails on MacOS. So it is not built automatically. Unfortunately, creating libosl.a turned out to be trickier than expected, because -fvisibility=hidden works only for dynamic libraries. So we need a different method to hide non-static internal symbols like make_message() which must not be global (external) because they might clash with symbols used in the application. objcopy(1) does the trick but we must provide a list of exceptional symbols that should not be made local. This list is generated from the osl.h header file. --- Makefile | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 100a486..967b00d 100644 --- a/Makefile +++ b/Makefile @@ -18,6 +18,8 @@ endif MKDIR := mkdir -p RM := rm -f LN := ln +LD := ld +OBJCOPY := objcopy # libosl's versioning consists of three numbers. Let's call them x, y and z. # The way x, y and z are interpreted depends on the OS. @@ -144,6 +146,13 @@ oslfsck.1: oslfsck $(realname): $(objects) $(CC) $(LDFLAGS) -o $@ $(objects) +$(libname).sym: osl.h.in + sed -Ene '/^int|^const/{s/.*(osl_.*)\(.*/\1/; p;}' $< > $@ +$(libname).ga: $(objects) + $(LD) -r -o $@ $(objects) +lib$(libname).a: $(libname).ga $(libname).sym + $(OBJCOPY) --keep-global-symbols $(libname).sym $(libname).ga $@ + osl_errors.h: errlist echo '/** public error codes of the osl library. */' > $@ sed -e 's/\([A-Z_]*\) .*/ E_OSL_\1/' \ @@ -162,7 +171,7 @@ osl.h: osl.h.in osl_errors.h Makefile echo '#endif /* _OSL_H */' >> $@ clean: rm -f *.o $(realname) osl.h osl_errors.h errtab.h fsck.cmdline.h \ - fsck.cmdline.c oslfsck + fsck.cmdline.c oslfsck *.a *.ga *.sym distclean: clean rm -f web/index.html web/oslfsck.1.html web/osl.png -- 2.39.5