t-aix43

gcc-you can use this code to learn something about gcc, and inquire further into linux,

# We want fine grained libraries, so use the new code to build the
# floating point emulation libraries.
FPBIT = fp-bit.c
DPBIT = dp-bit.c

dp-bit.c: $(srcdir)/config/fp-bit.c
	cat $(srcdir)/config/fp-bit.c > dp-bit.c

fp-bit.c: $(srcdir)/config/fp-bit.c
	echo '#define FLOAT' > fp-bit.c
	cat $(srcdir)/config/fp-bit.c >> fp-bit.c

# Build the libraries for pthread and all of the 
# different processor models

MULTILIB_OPTIONS	= pthread \
			  mcpu=common/mcpu=power/mcpu=powerpc/maix64

MULTILIB_DIRNAMES	= pthread \
			  common power powerpc ppc64

MULTILIB_MATCHES	= mcpu?power=mcpu?power \
			  mcpu?power=mcpu?power2 \
			  mcpu?powerpc=mcpu?power3 \
			  mcpu?powerpc=mcpu?power4 \
			  mcpu?powerpc=mcpu?powerpc \
			  mcpu?power=mcpu?rios1 \
			  mcpu?power=mcpu?rios2 \
			  mcpu?power=mcpu?rsc \
			  mcpu?power=mcpu?rsc1 \
			  mcpu?powerpc=mcpu?rs64a \
			  mcpu?powerpc=mcpu?601 \
			  mcpu?powerpc=mcpu?602 \
			  mcpu?powerpc=mcpu?603 \
			  mcpu?powerpc=mcpu?603e \
			  mcpu?powerpc=mcpu?604 \
			  mcpu?powerpc=mcpu?604e \
			  mcpu?powerpc=mcpu?620 \
			  mcpu?powerpc=mcpu?630

LIBGCC = stmp-multilib
INSTALL_LIBGCC = install-multilib

# Build a shared libgcc library.
SHLIB_EXT = .a
SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
	-Wl,-bE:@shlib_map_file@ -o @multilib_dir@/shr.o \
	@multilib_flags@ @shlib_objs@ -lc \
	`case @shlib_base_name@ in \
	*pthread*) echo -L/usr/lib/threads -lpthreads -lc_r /usr/lib/libc.a ;; \
	*) echo -lc ;; esac` ; \
	rm -f tmp-@shlib_base_name@.a ; \
	$(AR_CREATE_FOR_TARGET) tmp-@shlib_base_name@.a @multilib_dir@/shr.o ; \
	mv tmp-@shlib_base_name@.a @shlib_base_name@.a ; \
	rm -f @multilib_dir@/shr.o
# $(slibdir) double quoted to protect it from expansion while building
# libgcc.mk.  We want this delayed until actual install time.
SHLIB_INSTALL = $(INSTALL_DATA) @shlib_base_name@.a $$(DESTDIR)$$(slibdir)/
SHLIB_LIBS = -lc `case @shlib_base_name@ in *pthread*) echo -lpthread ;; esac`
SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
SHLIB_NM_FLAGS = -Bpg -X32_64

# Either 32-bit and 64-bit objects in archives.
AR_FLAGS_FOR_TARGET = -X32_64

# Compile Ada files with minimal-toc.  The primary focus is gnatlib, so
# that the library does not use nearly the entire TOC of applications
# until gnatlib is built as a shared library on AIX.  Compiling the
# compiler with -mminimal-toc does not cause any harm.
T_ADAFLAGS = -mminimal-toc