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cc/gcc: add option to enable 128-bit long doubles

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Needed by some PPC targets, at least.
Requires gcc 4.2+ (noticed by Arnaud LACOMBE).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
This commit is contained in:
Yann E. MORIN" 2010-10-09 22:49:28 +02:00
parent 8b0af28c69
commit 416eb29198
2 changed files with 25 additions and 0 deletions
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13
config/cc/gcc.in.2
View File

@ -105,3 +105,16 @@ config CC_GCC_LIBMUDFLAP
re-compilation and re-link, while it exists better run-time
alternatives (eg. DUMA, dmalloc...) that need neither re-
compilation nor re-link.
config CC_GCC_LDBL_128
tristate
prompt "Enable 128-bit long doubles"
default m
depends on CC_GCC_4_2_or_later
help
Saying 'Y' will force gcc to use 128-bit wide long doubles
Saying 'N' will force gcc to use 64-bit wide long doubles
Saying 'M' will let gcc choose (default is 128-bit for
glibc >= 2.4, 64-bit otherwise)
If in doubt, keep the default, ie. 'M'.

12
scripts/build/cc/gcc.sh
View File

@ -191,6 +191,12 @@ do_cc_core() {
extra_config+=("--enable-target-optspace")
fi
case "${CT_CC_GCC_LDBL_128}" in
Y) extra_config+=("--with-long-double-128");;
M) ;;
"") extra_config+=("--without-long-double-128");;
esac
CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
# Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
@ -420,6 +426,12 @@ do_cc() {
extra_config+=("--disable-libstdcxx-pch")
fi
case "${CT_CC_GCC_LDBL_128}" in
Y) extra_config+=("--with-long-double-128");;
M) ;;
"") extra_config+=("--without-long-double-128");;
esac
CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
# --enable-symvers=gnu really only needed for sh4 to work around a