GCC modified for the FreeChainXenon project
2079956a87
This patch adds a predefined macro __NO_MATH_ERRNO__ for when -fno-math-errno is passed or implied. This allows math.h to provide a more accurate definition of the C99 math_errhandling macro that takes this option into account, and allows for choice of libm functions to be optimized at compile time based on this option. (There may be a case for such interfaces for -fno-rounding-math (default) and -fno-trapping-math as well, but as C99 standard pragmas would allow those to vary on a per-block basis, predefined macros would be problematic as the interface; you can't select a -fno-trapping-math or -fno-rounding-math version of a function in a standard header if a conforming program could then use "#pragma STDC FENV_ACCESS ON" to require a -ftrapping-math -frounding-math version in a particular block. So built-in functions might be a better way of providing access to information about those options.) Bootstrapped with no regressions on x86_64-unknown-linux-gnu. OK to commit? * cppbuiltin.c (define_builtin_macros_for_compilation_flags): Define __NO_MATH_ERRNO__ if -fno-math-errno. * doc/cpp.texi (__NO_MATH_ERRNO__): Document predefined macro. c-family: * c-cppbuiltin.c (c_cpp_builtins_optimize_pragma): Define and undefine __NO_MATH_ERRNO__ based on changes to -fmath-errno state. testsuite: * gcc.dg/no-math-errno-1.c, gcc.dg/no-math-errno-2.c, gcc.dg/no-math-errno-3.c, gcc.dg/no-math-errno-4.c: New tests. From-SVN: r217420 |
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| boehm-gc | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcilkrts | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libjava | ||
| libobjc | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| README | ||
| symlink-tree | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.