From: Mike Frysinger <vapier@gentoo.org>
To: newlib@sourceware.org
Subject: what's up with _COMPILING_NEWLIB
Date: Sat, 6 Nov 2021 20:21:03 -0400 [thread overview]
Message-ID: <YYcb752EA71AhfF3@vapier> (raw)
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i stumbled across _COMPILING_NEWLIB and it seems to be what i want: a symbol
that indicates the code currently being compiled is newlib itself so that the
header can change behavior for that environment specifically. is that what
it's meant for ?
if so, why does it seem to be inconsistently defined ? newlib/configure.host
will add it for a few random targets, as does the mips-specific
newlib/libc/machine/mips/Makefile.am, as do a few specific winsup/cygwin/
files. it feels like the patch below is what we should have.
if that's not what this is for, is there a define that has this meaning ?
in the glibc & gnulib world, the plain _LIBC define indicates this.
-mike
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -54,7 +54,7 @@
# have_init_fini have init/fini ("yes" or "no", set to "yes" by default)
# noinclude list of include files to not install
-newlib_cflags=
+newlib_cflags="-D_COMPILING_NEWLIB"
libm_machine_dir=
machine_dir=
shared_machine_dir=
@@ -467,15 +467,11 @@ case "${host}" in
sys_dir=a29khif
signal_dir=
;;
- aarch64*-*-*)
- newlib_cflags="${newlib_cflags} -D_COMPILING_NEWLIB"
- ;;
amdgcn*)
sys_dir=amdgcn
have_crt0="no"
;;
arm*-*-*)
- newlib_cflags="${newlib_cflags} -D_COMPILING_NEWLIB"
sys_dir=arm
if [ "x${newlib_may_supply_syscalls}" = "xno" ] ; then
have_crt0="no"
@@ -652,11 +648,11 @@ case "${host}" in
default_newlib_io_long_double="yes"
default_newlib_io_pos_args="yes"
CC="${CC} -I${cygwin_srcdir}/include"
- newlib_cflags="${newlib_cflags} -DHAVE_OPENDIR -DHAVE_RENAME -DGETREENT_PROVIDED -DSIGNAL_PROVIDED -D_COMPILING_NEWLIB -DHAVE_BLKSIZE -DHAVE_FCNTL -DMALLOC_PROVIDED"
+ newlib_cflags="${newlib_cflags} -DHAVE_OPENDIR -DHAVE_RENAME -DGETREENT_PROVIDED -DSIGNAL_PROVIDED -DHAVE_BLKSIZE -DHAVE_FCNTL -DMALLOC_PROVIDED"
syscall_dir=syscalls
;;
*-*-phoenix*)
- newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES -D_COMPILING_NEWLIB -DHAVE_BLKSIZE -DHAVE_NANOSLEEP"
+ newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES -DHAVE_BLKSIZE -DHAVE_NANOSLEEP"
default_newlib_io_long_long="yes"
syscall_dir=
;;
@@ -671,7 +667,6 @@ case "${host}" in
default_newlib_io_long_long="yes"
default_newlib_io_c99_formats="yes"
newlib_cflags="${newlib_cflags} -ffunction-sections -fdata-sections "
- newlib_cflags="${newlib_cflags} -D_COMPILING_NEWLIB"
newlib_cflags="${newlib_cflags} -DCLOCK_PROVIDED -DMALLOC_PROVIDED -DEXIT_PROVIDED -DSIGNAL_PROVIDED -DGETREENT_PROVIDED -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_NANOSLEEP -DHAVE_BLKSIZE -DHAVE_FCNTL -DHAVE_ASSERT_FUNC"
# turn off unsupported items in posix directory
newlib_cflags="${newlib_cflags} -D_NO_GETLOGIN -D_NO_GETPWENT -D_NO_GETUT -D_NO_GETPASS -D_NO_SIGSET -D_NO_WORDEXP -D_NO_POPEN -D_NO_POSIX_SPAWN"
--- a/newlib/libc/machine/mips/Makefile.am
+++ b/newlib/libc/machine/mips/Makefile.am
@@ -9,8 +9,6 @@ AM_CCASFLAGS = $(INCLUDES)
noinst_LIBRARIES = lib.a
lib_a_SOURCES = setjmp.S strlen.c strcmp.S strncpy.c memset.S memcpy.S
-lib_a_CCASFLAGS=$(AM_CCASFLAGS) -D_COMPILING_NEWLIB
-lib_a_CFLAGS=$(AM_CFLAGS) -D_COMPILING_NEWLIB
ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
--- a/newlib/libc/machine/mips/Makefile.in
+++ b/newlib/libc/machine/mips/Makefile.in
@@ -198,8 +198,6 @@ INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
AM_CCASFLAGS = $(INCLUDES)
noinst_LIBRARIES = lib.a
lib_a_SOURCES = setjmp.S strlen.c strcmp.S strncpy.c memset.S memcpy.S
-lib_a_CCASFLAGS = $(AM_CCASFLAGS) -D_COMPILING_NEWLIB
-lib_a_CFLAGS = $(AM_CFLAGS) -D_COMPILING_NEWLIB
ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
all: all-am
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next reply other threads:[~2021-11-07 0:21 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-07 0:21 Mike Frysinger [this message]
2021-11-08 10:05 ` Corinna Vinschen
2021-11-08 11:46 ` Mike Frysinger
2021-11-08 15:05 ` Corinna Vinschen
2021-11-08 18:14 ` Mike Frysinger
2021-11-09 1:24 ` [PATCH 1/2] define _COMPILING_NEWLIB for all targets when compiling Mike Frysinger
2021-11-09 1:24 ` [PATCH 2/2] ctype: use less short names in public header Mike Frysinger
2021-11-09 11:38 ` Corinna Vinschen
2021-11-10 0:18 ` Mike Frysinger
2021-11-10 10:56 ` Corinna Vinschen
2021-11-30 12:18 ` Jonathan Wakely
2021-11-11 1:37 ` [PATCH v2] " Mike Frysinger
2021-11-11 10:35 ` Corinna Vinschen
2021-11-11 22:28 ` Mike Frysinger
2021-11-12 10:27 ` Corinna Vinschen
2021-11-20 20:08 ` Brian Inglis
2021-11-23 15:09 ` [PATCH 2/2] " Richard Earnshaw
2021-11-24 4:15 ` Mike Frysinger
2021-11-24 10:58 ` Richard Earnshaw
2021-11-24 11:01 ` Richard Earnshaw
2021-11-30 12:01 ` Jonathan Wakely
2021-11-30 15:14 ` Corinna Vinschen
2021-11-30 17:12 ` Jonathan Wakely
2021-11-30 17:15 ` Jonathan Wakely
2021-11-30 17:52 ` Richard Earnshaw
2021-12-02 10:27 ` Corinna Vinschen
2021-12-03 9:56 ` Corinna Vinschen
2021-12-05 9:42 ` Mike Frysinger
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