Joseph Myers 8df5d34720 Remove --with-fp / --without-fp. ... There is a configure option --without-fp that specifies that nofpu sysdeps directories should be used instead of fpu directories. For most glibc configurations, this option is of no use: either there is no valid nofpu variant of that configuration, or there are no fpu or nofpu sysdeps directories for that processor and so the option does nothing. For a few configurations, if you are using a soft-float compiler this option is required, and failing to use it generally results in compilation errors from inline asm using unavailable floating-point instructions. We're moving away from --with-cpu to configuring glibc based on how the compiler generates code, and it is natural to do so for --without-fp as well; in most cases the soft-float and hard-float ABIs are incompatible so you have no hope of building a working glibc with an inappropriately configured compiler or libgcc. This patch eliminates --without-fp, replacing it entirely by automatic configuration based on the compiler. Configurations for which this is relevant (coldfire / mips / powerpc32 / sh) define a variable with_fp_cond in their preconfigure fragments (under the same conditions under which those fragments do anything); this is a preprocessor conditional which the toplevel configure script then uses in a test to determine which sysdeps directories to use. The config.make with-fp variable remains. It's used only by powerpc (sysdeps/powerpc/powerpc32/Makefile) to add -mhard-float to various flags variables. For powerpc, -mcpu= options can imply use of soft-float. That could be an issue if you want to build for e.g. 476fp, but are using --with-cpu=476 because there isn't a 476fp sysdeps directory. If in future we eliminate --with-cpu and replace it entirely by testing the compiler, it would be natural at that point to eliminate that code as well (as the user should then just use a compiler defaulting to 476fp and the 476 sysdeps directory would be used automatically). Tested for x86_64, and tested with build-many-glibcs.py that installed shared libraries are unchanged by this patch. * configure.ac (--with-fp): Remove configure option. (with_fp_cond): New variable. (libc_cv_with_fp): New configure test. Use this variable instead of with_fp. * configure: Regenerated. * config.make.in (with-fp): Use @libc_cv_with_fp@. * manual/install.texi (Configuring and compiling): Remove --without-fp. * INSTALL: Regenerated. * sysdeps/m68k/preconfigure (with_fp_cond): Define for ColdFire. * sysdeps/mips/preconfigure (with_fp_cond): Define. * sysdeps/powerpc/preconfigure (with_fp_cond): Define for 32-bit. * sysdeps/sh/preconfigure (with_fp_cond): Define. * scripts/build-many-glibcs.py (Context.add_all_configs): Do not use --without-fp to configure glibc.		2017-12-12 13:56:47 +00:00
..
bits
fpu
ieee754	Add _Float64x function aliases.	2017-11-27 14:16:47 +00:00
include/sys
mips32
mips64
nptl	nptl: Define __PTHREAD_MUTEX_{NUSERS_AFTER_KIND,USE_UNION}	2017-11-07 09:48:41 -02:00
sys
__longjmp.c
abort-instr.h
add_n.S
addmul_1.S
atomic-machine.h
backtrace.c
bsd-_setjmp.S
bsd-setjmp.S
configure
configure.ac
dl-dtprocnum.h
dl-machine-reject-phdr.h
dl-machine.h	mips: Don't use MIN in dl-machine.h	2017-11-30 16:34:09 -08:00
dl-procinfo.c
dl-procinfo.h
dl-tls.h
dl-trampoline.c
fpregdef.h
fpu_control.h
gccframe.h
Implies
jmpbuf-unwind.h
ldsodefs.h
libc-tls.c
linkmap.h
localplt.data
lshift.S
machine-gmon.h
Makefile
math_private.h
math-tests.h
memcpy.S	Replace "if if " with "if " in comments	2017-10-25 08:05:51 -07:00
memset.S	Replace "if if " with "if " in comments	2017-10-25 08:05:51 -07:00
memusage.h
mul_1.S
nan-high-order-bit.h
preconfigure	Remove --with-fp / --without-fp.	2017-12-12 13:56:47 +00:00
regdef.h
rshift.S
setjmp_aux.c
setjmp.S
sgidefs.h
sotruss-lib.c
stackinfo.h
start.S
strcmp.S
sub_n.S
submul_1.S
tininess.h
tls-macros.h
tst-abi-fp32mod.c
tst-abi-fp64amod.c
tst-abi-fp64mod.c
tst-abi-fpxxmod.c
tst-abi-fpxxomod.c
tst-abi-interlink.c
tst-audit.h
tst-mode-switch-1.c
tst-mode-switch-2.c
tst-mode-switch-3.c