In gcc 4.3, you can unpack the gmp and mpfr libraries into your source tree,
and gcc will build, even if gmp and mpfr are not installed on the host system.
That appears to be broken in mainline as of 2008-10-22. The problem is that
the top level configury passes --with-gmp-build when configuring mpfr. The
mpfr library records that in its Makefile using CPPFLAGS. Now the top level
Makefile overrides CPPFLAGS. The effect:
make[4]: Entering directory `/home/jingyu/projects/gcc/obj-gcc-i686/mpfr'
/bin/sh ./libtool --tag=CC --mode=compile gcc -DHAVE_INTTYPES_H=1
-DHAVE_STDINT_H=1 -DTIME_WITH_SYS_TIME=1 -DHAVE_STDARG=1
-DHAVE_SYS_TIME_H=1 -DHAVE_SETLOCALE=1 -DHAVE_GETTIMEOFDAY=1
-DMPFR_HAVE_FESETROUND=1 -DHAVE_FLOOR=1 -DHAVE_CEIL=1
-DHAVE_LDOUBLE_IEEE_EXT_LITTLE=1 -DHAVE_ATTRIBUTE_MODE=1
-DHAVE_ALLOCA_H=1 -I. -I../../gcc_src/mpfr -g
-fkeep-inline-functions -MT exceptions.lo -MD -MP -MF
.deps/exceptions.Tpo -c -o exceptions.lo
../../gcc_src/mpfr/exceptions.c
gcc -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DTIME_WITH_SYS_TIME=1
-DHAVE_STDARG=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SETLOCALE=1
-DHAVE_GETTIMEOFDAY=1 -DMPFR_HAVE_FESETROUND=1 -DHAVE_FLOOR=1
-DHAVE_CEIL=1 -DHAVE_LDOUBLE_IEEE_EXT_LITTLE=1 -DHAVE_ATTRIBUTE_MODE=1
-DHAVE_ALLOCA_H=1 -I. -I../../gcc_src/mpfr -g -fkeep-inline-functions
-MT exceptions.lo -MD -MP -MF .deps/exceptions.Tpo -c
../../gcc_src/mpfr/exceptions.c -o exceptions.o
In file included from ../../gcc_src/mpfr/exceptions.c:23:
../../gcc_src/mpfr/mpfr-impl.h:74:19: error: gmp.h: No such file or directory
In file included from ../../gcc_src/mpfr/mpfr-impl.h:77,
from ../../gcc_src/mpfr/exceptions.c:23:
../../gcc_src/mpfr/mpfr.h:39:18: error: gmp.h: No such file or directory
--
Summary: [4.4 regression] in-tree gmp and mpfr libraries no
longer work
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: drow at gcc dot gnu dot org
ReportedBy: ian at airs dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38014
