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Minimize printf/scanf size on platforms that don't need C99.

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* acconfig.h (_WANT_IO_C99_FORMATS): New macro.
* newlib.hin (_WANT_IO_C99_FORMATS): Likewise.
* configure.in (newlib-io-c99-formats): New configure option.
(_WANT_IO_C99_FORMATS): Define appropriately.
* configure.host (*-linux*, cygwin): Default c99-formats to yes.
* libc/stdio/vfprintf.c (_VFPRINTF_R) [!_WANT_IO_C99_FORMATS]:
Cripple ' flag; hh, z, j, t sizes; a, A, F, C, S specifiers.
* libc/stdio/vfscanf.c (_VFSCANF_R) [!_WANT_IO_C99_FORMATS]:
Likewise.
* configure: Regenerate.
This commit is contained in:
Eric Blake
2007-05-11 20:09:00 +00:00
parent b8a37af936
commit 0962fe9178
8 changed files with 187 additions and 63 deletions
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11
newlib/configure.host
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@ -24,6 +24,7 @@
# target_optspace --enable-target-optspace ("yes", "no", "")
# newlib_multithread --enable-newlib-multithread ("yes", "no", "yes")
# newlib_elix_level --enable-newlib-elix-level ("1","2","3","4") ("4")
# newlib_io_c99_formats --enable-newlib-io-c99-formats ("yes", "no", "")
# newlib_io_long_long --enable-newlib-io-long-long ("yes", "no", "")
# newlib_io_long_double --enable-newlib-io-long-double ("yes", "no", "")
@ -62,6 +63,7 @@ crt1_dir=
have_crt0=
use_libtool=no
have_sys_mach_dir=no
default_newlib_io_c99_formats=no
default_newlib_io_long_long=no
default_newlib_io_long_double=no
default_newlib_io_pos_args=no
@ -398,6 +400,7 @@ case "${host}" in
crt1=crt1.o
crt1_dir=libc/sys/${sys_dir}
gcc_dir=`gcc -print-search-dirs | awk '/^install:/{print $2}'`
default_newlib_io_c99_formats="yes"
default_newlib_io_long_double="yes"
default_newlib_io_long_long="yes"
default_newlib_io_pos_args="yes"
@ -498,6 +501,7 @@ case "${host}" in
*-*-cygwin*)
test -z "$cygwin_srcdir" && cygwin_srcdir=`cd ${srcdir}/../winsup/cygwin; pwd`
export cygwin_srcdir
default_newlib_io_c99_formats="yes"
default_newlib_io_long_long="yes"
default_newlib_io_long_double="yes"
default_newlib_io_pos_args="yes"
@ -744,6 +748,13 @@ esac
# Use defaults for certain settings if not specified by user
# Enable C99 format support in I/O routines if requested.
if [ "x${newlib_io_c99_formats}" = "x" ]; then
if [ ${default_newlib_io_c99_formats} = "yes" ]; then
newlib_io_c99_formats="yes";
fi
fi
# Enable long long support in I/O routines if requested.
if [ "x${newlib_io_long_long}" = "x" ]; then
if [ ${default_newlib_io_long_long} = "yes" ]; then