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Joseph Myers eda162dd8a Remove _Mlong_double_ etc. macros. 
math.h has a macro _Mlong_double_ for the type to use when declaring
long double functions, and similar macros for other types.
math/Makefile uses -D_Mlong_double_=double in the case of long double
having the same ABI as double.

This originates with:

Mon Jul  8 13:37:40 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>

        * math/math.h (_Mfloat_, _Mlong_double_): New macros, defined iff not
        already defined to float, long double.  Use those macros for _Mdouble_
        defns when including mathcalls.h.
        * math/Makefile [$(long-double-fcts) != yes] (CPPFLAGS): Append
        -D_Mlong_double_=double.

However, math.h stopped declaring long double functions in the case of
long double having the same ABI as double (and thus probably stopped
actually needing the Makefile definition of _Mlong_double_) with:

1998-11-05  Ulrich Drepper  <drepper@cygnus.com>

        * math/math.h: Unconditionally include bits/mathdef.h.  Declare
        long double functions only if __NO_LONG_DOUBLE_MATH is not
        defined.
        * sysdeps/generic/bits/mathdef.h: Define only if __USE_ISOC9X.
        Define __NO_LONG_DOUBLE_MATH.
        * sysdeps/m68k/fpu/bits/mathdef.h: Define only if __USE_ISOC9X.
        * sysdeps/i386/fpu/bits/mathdef.h: Likewise.

The declarations were since restored for compiling user code, but
remain absent when _LIBC is defined, which is sufficient to avoid
problems declaring function aliases of incompatible types.  Thus the
indirection through the _Mlong_double_ macro is not needed (probably
since that 1998 patch), and this patch removes _Mlong_double_ and
associated macros for other types, leaving only the macro _Mdouble_
which is actually used as the type for which a given inclusion of
<bits/mathcalls.h> should declared functions.

Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by this patch.

	* math/math.h [!_Mfloat_] (_Mfloat_): Do not define.
	[!_Mlong_double_] (_Mlong_double_): Likewise.
	[!_Mfloat16_] (_Mfloat16_): Likewise.
	[!_Mfloat32_] (_Mfloat32_): Likewise.
	[!_Mfloat64_] (_Mfloat64_): Likewise.
	[!_Mfloat128_] (_Mfloat128_): Likewise.
	[!_Mfloat32x_] (_Mfloat32x_): Likewise.
	[!_Mfloat64x_] (_Mfloat64x_): Likewise.
	[!_Mfloat128x_] (_Mfloat128x_): Likewise.
	(_Mdouble_): Define without indirection through those macros.
	* math/complex.h [!_Mfloat_] (_Mfloat_): Do not define.
	[!_Mfloat128_] (_Mfloat128_): Likewise.
	[_Mlong_double_] (_Mlong_double_): Likewise.
	(_Mdouble_): Define without indirection through those macros.
	* math/Makefile [$(long-double-fcts) != yes] (math-CPPFLAGS): Do
	not add -D_Mlong_double_=double.
	* include/math.h [_ISOMAC] (_Mlong_double_): Do not undefine.
	* math/test-signgam-finite-c99.c (_Mlong_double_): Likewise.
2017-10-30 20:58:51 +00:00
..
arpa nss_dns: Replace local declarations with declarations from a header file 2017-04-04 20:56:23 +02:00
bits Fix sigval namespace (bug 21944). 2017-08-16 20:33:59 +00:00
gnu Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
net Fix resolver if_* namespace (bug 17717). 2014-12-16 18:18:49 +00:00
netinet Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
programs Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
protocols (abmon): Remove spaces. 1998-11-12 18:03:43 +00:00
rpc Mark internal rpc functions with attribute_hidden [BZ #18822] 2017-10-01 15:55:15 -07:00
rpcsvc Deprecate libnsl by default (only shared library will be 2017-03-21 15:14:27 +01:00
sys Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
aio.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
aliases.h Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822] 2017-10-01 15:21:00 -07:00
alloc_buffer.h Replace "if if " with "if " in comments 2017-10-25 08:05:51 -07:00
alloca.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
argp-fmtstream.h Mark internal argp functions with attribute_hidden [BZ #18822] 2017-10-01 15:10:27 -07:00
argp.h Mark internal argp functions with attribute_hidden [BZ #18822] 2017-10-01 15:10:27 -07:00
argz.h Mark internal argz functions with attribute_hidden [BZ #18822] 2017-08-18 09:31:33 -07:00
assert.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
atomic.h Optimize generic spinlock code and use C11 like atomic macros. 2017-06-06 09:41:56 +02:00
byteswap.h Update. 1998-04-10 10:52:25 +00:00
caller.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
complex.h float128: Add private _Float128 declarations for libm. 2017-05-15 10:23:28 -03:00
cpio.h Add more headers to include/ for conform tests. 2014-12-11 21:41:30 +00:00
crypt.h Add include/crypt.h. 2016-10-28 22:40:16 -04:00
ctype.h Rename bits/libc-tsd.h to libc-tsd.h (bug 14912). 2015-09-03 20:33:46 +00:00
des.h Update. 1998-03-24 10:39:42 +00:00
dirent.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
dlfcn.h Mark internal functions with attribute_hidden [BZ #18822] 2017-10-01 15:07:23 -07:00
dso_handle.h Mark __dso_handle as hidden [BZ #18822] 2017-09-26 16:53:44 -07:00
elf.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
endian.h Update. 2001-03-30 05:34:59 +00:00
envz.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
err.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
errno.h Remove __need macros from errno.h (__need_Emath, __need_error_t). 2017-06-14 08:14:34 -04:00
error.h Update. 1997-06-21 02:59:26 +00:00
execinfo.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
fcntl.h Consolidate remaning non cancellable definitions 2017-08-23 10:47:03 -03:00
features.h Ensure C99 and C11 interfaces are available for C++ [BZ #21326] 2017-10-09 16:18:11 +02:00
fenv.h Mark fegetround pure (bug 16296). 2015-09-15 20:36:50 +00:00
float.h Use __f128 to define FLT128_* constants in include/float.h for old GCC. 2017-10-17 20:16:01 +00:00
fmtmsg.h Add more headers to include/ for conform tests. 2014-12-11 21:41:30 +00:00
fnmatch.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
fpu_control.h Hide internal __setfpucw function [BZ #18822] 2017-10-01 17:52:15 -07:00
ftw.h Update. 1997-06-21 02:59:26 +00:00
gconv.h Update. 1997-11-18 02:50:07 +00:00
getopt_int.h Update. 2004-03-09 10:36:53 +00:00
getopt.h getopt: remove USE_NONOPTION_FLAGS 2017-04-07 07:45:53 -04:00
glob.h Hide internal __glob64 function [BZ #18822] 2017-10-01 18:02:10 -07:00
gmp.h Mark internal gmp functions with attribute_hidden [BZ #18822] 2017-10-01 15:15:30 -07:00
gnu-versions.h posix: Add compat glob symbol to not follow dangling symbols 2017-09-25 18:04:16 -07:00
grp-merge.h NSS: Implement group merging support. 2016-04-29 22:18:21 -04:00
grp.h Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:13:13 -07:00
gshadow.h Mark internal gshadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:19:17 -07:00
iconv.h Update. 1999-08-21 00:38:15 +00:00
idna.h Hide internal idna functions [BZ #18822] 2017-10-01 17:33:22 -07:00
ifaddrs.h hurd: Fix getifaddrs' and freeifaddrs' symbol exposition 2017-09-28 01:05:18 +02:00
ifreq.h Hide internal __ifreq function [BZ #18822] 2017-10-01 17:35:46 -07:00
ifunc-impl-list.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
inline-hashtab.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
langinfo.h Add first fixes for conformtest for POSIX2008 2012-02-26 21:32:56 -05:00
libc-diag.h Split DIAG_* macros to new header libc-diag.h. 2017-02-25 09:59:46 -05:00
libc-internal.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
libc-pointer-arith.h Narrowing the visibility of libc-internal.h even further. 2017-03-01 20:33:46 -05:00
libc-symbols.h Don't use hidden visibility in libc.a with PIE on i386 2017-10-04 17:18:42 -07:00
libgen.h Update. 1997-06-21 02:59:26 +00:00
libintl.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
libio.h Remove _IO_MTSAFE_IO from public headers. 2017-05-11 19:14:11 -04:00
limits.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
link.h Move hidden_proto (__dl_iterate_phdr) to include/link.h [BZ #18822] 2017-10-01 16:09:38 -07:00
list_t.h Remove __need_list_t and __need_res_state. 2017-05-20 19:01:46 -04:00
list.h Remove __need_list_t and __need_res_state. 2017-05-20 19:01:46 -04:00
locale.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
malloc.h Hide internal __malloc_check_init function [BZ #18822] 2017-10-01 16:00:36 -07:00
math.h Remove _Mlong_double_ etc. macros. 2017-10-30 20:58:51 +00:00
mcheck.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
memory.h Update. 1997-06-21 02:59:26 +00:00
mntent.h Hide internal __hasmntopt function [BZ #18822] 2017-10-01 17:37:42 -07:00
monetary.h Hide internal __vstrfmon_l function [BZ #18822] 2017-10-01 17:45:07 -07:00
mqueue.h Fix mq_receive, mq_send mq_timed* namespace (bug 18545). 2015-06-17 20:19:04 +00:00
netdb.h Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822] 2017-10-01 15:21:00 -07:00
netgroup.h Update. 1997-06-21 02:59:26 +00:00
nl_types.h Update. 1997-12-22 20:53:38 +00:00
nss.h NSS: Remove internal_function function attribute 2017-08-31 15:59:06 +02:00
nsswitch.h Update. 1997-06-21 02:59:26 +00:00
obstack.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
plural-exp.h Hide internal __gettextparse function [BZ #18822] 2017-10-01 17:31:05 -07:00
poll.h Update. 2000-08-21 16:02:48 +00:00
printf.h Hide internal printf functions [BZ #18822/21986] 2017-08-22 07:50:57 -07:00
pthread.h Fix mq_notify pthread_barrier_* namespace (bug 18544). 2015-06-17 20:16:56 +00:00
pty.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
pwd.h Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:13:13 -07:00
regex.h Hide internal regex functions [BZ #18822] 2017-10-01 15:53:15 -07:00
resolv.h resolv: Introduce struct resolv_context [BZ #21668] 2017-07-03 20:52:59 +02:00
rounding-mode.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sched.h Hide internal __sched_setparam function [BZ #18822] 2017-10-01 17:43:25 -07:00
scratch_buffer.h scratch_buffer: use union for internal buffer 2017-09-25 18:04:22 -07:00
search.h Hide internal __tdestroy function [BZ #18822] 2017-10-01 16:06:58 -07:00
set-hooks.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
setjmp.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
sgtty.h Update. 1997-06-21 02:59:26 +00:00
shadow.h Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:13:13 -07:00
shlib-compat.h shlib-compat: Update documentation of the compat_symbol_reference macro 2017-10-16 20:43:28 +02:00
signal.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
spawn.h Update. 2000-10-01 19:15:29 +00:00
stab.h Update. 1997-06-21 02:59:26 +00:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stap-probe.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stdc-predef.h Bug 21533: Update to Unicode 10.0.0 2017-06-22 17:02:55 +02:00
stdio_ext.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
stdio.h Mark internal stdio functions with attribute_hidden [BZ #18822] 2017-10-01 15:20:13 -07:00
stdlib.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
string.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
strings.h Update. 1997-06-21 02:59:26 +00:00
stropts.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
stubs-prologue.h * sysdeps/generic/bits/libc-tsd.h [USE___THREAD]: Conditional 2002-10-11 10:52:20 +00:00
syscall.h Update. 1997-06-21 02:59:26 +00:00
sysexits.h Update. 1997-06-21 02:59:26 +00:00
syslog.h Update. 1997-06-21 02:59:26 +00:00
tar.h Update. 1997-06-21 02:59:26 +00:00
termios.h Hide internal __tcgetattr function [BZ #18822] 2017-10-01 17:48:24 -07:00
tgmath.h Update. 1998-09-06 23:45:24 +00:00
time.h Mark internal time functions with attribute_hidden [BZ #18822] 2017-10-01 15:17:32 -07:00
ttyent.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
uchar.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
ucontext.h Update. 1999-10-12 18:17:41 +00:00
ulimit.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
unistd.h Mark internal unistd functions with attribute_hidden [BZ #18822] 2017-10-01 15:12:04 -07:00
utime.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
utmp.h Mark internal utmp functions with attribute_hidden [BZ #18822] 2017-10-01 15:51:56 -07:00
values.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wchar.h Mark internal wchar functions with attribute_hidden [BZ #18822] 2017-10-01 15:14:33 -07:00
wctype.h Remove __need macros from stdio.h and wchar.h. 2017-06-08 13:58:17 -04:00
wordexp.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00