Date: Tue, 17 Jul 2012 13:45:28 -0400 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Subject: Re: customizable -lgcc in makefile On Tue, Jul 17, 2012 at 06:37:28PM +0200, Szabolcs Nagy wrote: > the following modification allows config.mak > to override the -lgcc linker flag > > this is needed when compiling musl with pcc > (then LIBCC=-Lpath/to/libpcc -lpcc) > > i wonder what clang needs there and if there is > any libgcc specific code in musl musl itself does not contain any references to libgcc/libpcc/etc. The references are generated by the compiler when it's too lazy to actually generate the code it needs for things like 64-bit division and instead just generates a function call to library code. > diff --git a/Makefile b/Makefile > index 0c13417..ad701c9 100644 > --- a/Makefile > +++ b/Makefile > @@ -23,6 +23,7 @@ GENH = include/bits/alltypes.h > IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h > > LDFLAGS = > +LIBCC = -lgcc > CPPFLAGS = > CFLAGS = -Os -pipe > CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc > @@ -91,7 +92,7 @@ include/bits/alltypes.h: include/bits/alltypes.h.sh > lib/libc.so: $(LOBJS) > $(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \ > -Wl,-e,_start -Wl,-Bsymbolic-functions \ > - -Wl,-soname=libc.so -o $@ $(LOBJS) -lgcc > + -Wl,-soname=libc.so -o $@ $(LOBJS) $(LIBCC) Looks clean. I'll probably apply this soon unless any improvements are suggested. Rich
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