diff options
Diffstat (limited to 'toolchain/glibc/patches/2.26/0006-Let-fpclassify-use-the-builtin-when-optimizing-for-s.patch')
| -rw-r--r-- | toolchain/glibc/patches/2.26/0006-Let-fpclassify-use-the-builtin-when-optimizing-for-s.patch | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/toolchain/glibc/patches/2.26/0006-Let-fpclassify-use-the-builtin-when-optimizing-for-s.patch b/toolchain/glibc/patches/2.26/0006-Let-fpclassify-use-the-builtin-when-optimizing-for-s.patch deleted file mode 100644 index 37807c459..000000000 --- a/toolchain/glibc/patches/2.26/0006-Let-fpclassify-use-the-builtin-when-optimizing-for-s.patch +++ /dev/null @@ -1,63 +0,0 @@ -From 33f54cf4f81a51e5c8cbfb2408edd439bdee9435 Mon Sep 17 00:00:00 2001 -From: "Gabriel F. T. Gomes" <gabriel@inconstante.eti.br> -Date: Wed, 20 Sep 2017 15:10:26 -0300 -Subject: [PATCH] Let fpclassify use the builtin when optimizing for size in - C++ mode (bug 22146) - -When optimization for size is on (-Os), fpclassify does not use the -type-generic __builtin_fpclassify builtin, instead it uses __MATH_TG. -However, when library support for float128 is available, __MATH_TG uses -__builtin_types_compatible_p, which is not available in C++ mode. - -On the other hand, libstdc++ undefines (in cmath) many macros from -math.h, including fpclassify, so that it can provide its own functions. -However, during its configure tests, libstdc++ just tests for the -availability of the macros (it does not undefine them, nor does it -provide its own functions). - -Finally, when libstdc++ is configured with optimization for size -enabled, its configure tests include math.h and get the definition of -fpclassify that uses __MATH_TG (and __builtin_types_compatible_p). -Since libstdc++ does not undefine the macros during its configure tests, -they fail. - -This patch lets fpclassify use the builtin in C++ mode, even when -optimization for size is on. This allows the configure test in -libstdc++ to work. - -Tested for powerpc64le and x86_64. - - [BZ #22146] - math/math.h: Let fpclassify use the builtin in C++ mode, even - when optimazing for size. - -(cherry picked from commit c5c4a626098ec884b8527356abdf2a4bb7b6bf27) - -[Romain rebase on glibc 2.26) -Signed-off-by: Romain Naour <romain.naour@gmail.com> ---- - math/math.h | 8 +++++++- - 1 file changed, 7 insertions(+), 1 deletion(-) - -diff --git a/math/math.h b/math/math.h -index 7c0fc6d..f9348ec 100644 ---- a/math/math.h -+++ b/math/math.h -@@ -402,7 +402,13 @@ enum - - /* Return number of classification appropriate for X. */ - # if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__ \ -- && !defined __OPTIMIZE_SIZE__ -+ && (!defined __OPTIMIZE_SIZE__ || defined __cplusplus) -+ /* The check for __cplusplus allows the use of the builtin, even -+ when optimization for size is on. This is provided for -+ libstdc++, only to let its configure test work when it is built -+ with -Os. No further use of this definition of fpclassify is -+ expected in C++ mode, since libstdc++ provides its own version -+ of fpclassify in cmath (which undefines fpclassify). */ - # define fpclassify(x) __builtin_fpclassify (FP_NAN, FP_INFINITE, \ - FP_NORMAL, FP_SUBNORMAL, FP_ZERO, x) - # else --- -2.9.5 - |