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| author | Bruno Haible <bruno@clisp.org> | 2018-10-14 09:27:21 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2018-10-14 09:34:49 +0200 |
| commit | 634ee598d986cc2b9ff13b31aa70b448da471373 (patch) | |
| tree | f537015ac259c5e3887731a051d5fea64446ff9c /m4/floor.m4 | |
| parent | 6c3b072e6a48d45455b37420caf14b804cbba23c (diff) | |
| download | gnulib-634ee598d986cc2b9ff13b31aa70b448da471373.tar.gz | |
floor, ceil, trunc, truncf, truncl: Defeat GCC optimizations.
* m4/floor.m4 (gl_FUNC_FLOOR_LIBS): Use 'floor' also through a function
pointer.
* m4/ceil.m4 (gl_FUNC_CEIL_LIBS): Use 'ceil' also through a function
pointer.
* m4/trunc.m4 (gl_FUNC_TRUNC): Use 'trunc' also through a function
pointer.
* m4/truncf.m4 (gl_FUNC_TRUNCF): Use 'truncf' also through a function
pointer.
* m4/truncl.m4 (gl_FUNC_TRUNCL): Use 'truncl' also through a function
pointer.
Diffstat (limited to 'm4/floor.m4')
| -rw-r--r-- | m4/floor.m4 | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/m4/floor.m4 b/m4/floor.m4 index 15fa84d2b1..bef45a1e0d 100644 --- a/m4/floor.m4 +++ b/m4/floor.m4 @@ -1,4 +1,4 @@ -# floor.m4 serial 10 +# floor.m4 serial 11 dnl Copyright (C) 2007, 2009-2018 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -77,8 +77,9 @@ AC_DEFUN([gl_FUNC_FLOOR_LIBS], # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> + double (*funcptr) (double) = floor; double x;]], - [[x = floor(x);]])], + [[x = funcptr(x) + floor(x);]])], [gl_cv_func_floor_libm=]) if test "$gl_cv_func_floor_libm" = "?"; then save_LIBS="$LIBS" @@ -89,8 +90,9 @@ AC_DEFUN([gl_FUNC_FLOOR_LIBS], # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> + double (*funcptr) (double) = floor; double x;]], - [[x = floor(x);]])], + [[x = funcptr(x) + floor(x);]])], [gl_cv_func_floor_libm="-lm"]) LIBS="$save_LIBS" fi |