scc

commit 49fa8cec5a252cbf835af351f86175ad0a7d2e0a
parent db0fb021818f369c16fe70bc252fad5461247ef6
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Wed, 23 Oct 2024 13:53:54 +0200

build: Add helper config target for musl

Setting correctly the musl libc configuration is not easy, and
having a target that simplifies the process helps to casual users.
This commits also adds some examples in the documentation about
how to use this new target.

Diffstat:
M
Makefile
 | 
7
+++++++
M
README
 | 
17
+++++++++++++++++
M
include/bits/scc/Makefile
 | 
4
++--

3 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
@@ -13,6 +13,13 @@ config: FORCE
 	./scripts/config
 	$(MAKE) -f main.mk config
 
+config-musl: config FORCE
+	gcc -v 2>&1 |\
+	sed -En '/COLLECT_LTO_WRAPPER=/ s/.*=(.*)\/lto-wrapper/\1/p' |\
+	(read path; \
+	 printf "g/define GCCLIBPATH/ s@.*@#define GCCLIBPATH \"$$path\"@\nw\n") |\
+	ed -s include/bits/scc/sys.h
+
 clean: FORCE
 	touch config.mk
 	$(MAKE) -f main.mk clean
diff --git a/README b/README
@@ -205,6 +205,23 @@ environment variable SCCLIBPREFIX must be set:
 
 	$ SCCLIBPREFIX=/usr/local/musl scc hello.c
 
+Be sure that you modified `include/bits/scc/sys.h` to accomodate it to
+your system, specially the macro `GCCLIBPATH` that is heavily system
+dependent. In order to simplify this process the top level Makefile
+has a helper target `config-musl` that uses the gcc output to set it
+correctly:
+
+	$ make LIBPREFIX=/usr/local/musl LIBPROFILE=musl config-musl
+	$ make
+	$ LIBPREFIX=/usr/local/musl scc hello.c
+
+or
+
+	$ make LIBPREFIX=/usr/local/musl LIBPROFILE=musl config-musl
+	$ make
+	$ make install
+	$ scc-cc hello.c
+
 Deviations from standard C
 ===========================
 This compiler aims to be fully compatible with the C99 standard, but
diff --git a/include/bits/scc/Makefile b/include/bits/scc/Makefile
@@ -7,7 +7,7 @@ NODEP = 1
 
 all: config.h sys.h cstd.h
 
-cstd.h:
+cstd.h: FORCE
 	cp cstd-$(STD).h $@
 
 config.h: FORCE
@@ -20,7 +20,7 @@ config.h: FORCE
 	 echo '#define LIBPREFIX "$(LIBPREFIX)"';\
 	 echo '#define FORMAT "$(FORMAT)"') > $$$$.h && mv $$$$.h $@
 
-sys.h:
+sys.h: FORCE
 	rm -f $@;\
 	trap "rm -f $$$$.tmp" INT QUIT TERM HUP;\
 	sed -e 's/%NOPIE%/"$(NOPIE_LDFLAGS)",/' \