diff options
Diffstat (limited to 'cpp/m4')
| -rw-r--r-- | cpp/m4/clock_time.m4 | 30 | ||||
| -rw-r--r-- | cpp/m4/compiler-flags.m4 | 23 | ||||
| -rw-r--r-- | cpp/m4/extensions.m4 | 58 |
3 files changed, 111 insertions, 0 deletions
diff --git a/cpp/m4/clock_time.m4 b/cpp/m4/clock_time.m4 new file mode 100644 index 0000000000..227a5978e5 --- /dev/null +++ b/cpp/m4/clock_time.m4 @@ -0,0 +1,30 @@ +# clock_time.m4 serial 8 +dnl Copyright (C) 2002-2006 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +# Check for clock_gettime and clock_settime, and set LIB_CLOCK_GETTIME. +# For a program named, say foo, you should add a line like the following +# in the corresponding Makefile.am file: +# foo_LDADD = $(LDADD) $(LIB_CLOCK_GETTIME) + +AC_DEFUN([gl_CLOCK_TIME], +[ + dnl Persuade glibc and Solaris <time.h> to declare these functions. + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + + # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function. + # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4. + + # Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all* + # programs in the package would end up linked with that potentially-shared + # library, inducing unnecessary run-time overhead. + gl_saved_libs=$LIBS + AC_SEARCH_LIBS(clock_gettime, [rt posix4], + [test "$ac_cv_search_clock_gettime" = "none required" || + LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime]) + AC_SUBST([LIB_CLOCK_GETTIME]) + AC_CHECK_FUNCS(clock_gettime clock_settime) + LIBS=$gl_saved_libs +]) diff --git a/cpp/m4/compiler-flags.m4 b/cpp/m4/compiler-flags.m4 new file mode 100644 index 0000000000..01cb728f02 --- /dev/null +++ b/cpp/m4/compiler-flags.m4 @@ -0,0 +1,23 @@ +# serial 3 +# Find valid warning flags for the C Compiler. -*-Autoconf-*- +dnl Copyright (C) 2001, 2002, 2006 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. +dnl Written by Jesse Thilo. + +AC_DEFUN([gl_COMPILER_FLAGS], + [AC_MSG_CHECKING(whether compiler accepts $1) + AC_SUBST(COMPILER_FLAGS) + ac_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $1" + ac_save_CXXFLAGS="$CXXFLAGS" + CXXFLAGS="$CXXFLAGS $1" + AC_TRY_COMPILE(, + [int x;], + COMPILER_FLAGS="$COMPILER_FLAGS $1" + AC_MSG_RESULT(yes), + AC_MSG_RESULT(no)) + CFLAGS="$ac_save_CFLAGS" + CXXFLAGS="$ac_save_CXXFLAGS" + ]) diff --git a/cpp/m4/extensions.m4 b/cpp/m4/extensions.m4 new file mode 100644 index 0000000000..143a9e5403 --- /dev/null +++ b/cpp/m4/extensions.m4 @@ -0,0 +1,58 @@ +# serial 4 -*- Autoconf -*- +# Enable extensions on systems that normally disable them. + +# Copyright (C) 2003, 2006 Free Software Foundation, Inc. +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS +# Autoconf. Perhaps we can remove this once we can assume Autoconf +# 2.61 or later everywhere, but since CVS Autoconf mutates rapidly +# enough in this area it's likely we'll need to redefine +# AC_USE_SYSTEM_EXTENSIONS for quite some time. + +# AC_USE_SYSTEM_EXTENSIONS +# ------------------------ +# Enable extensions on systems that normally disable them, +# typically due to standards-conformance issues. +AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS], +[ + AC_BEFORE([$0], [AC_COMPILE_IFELSE]) + AC_BEFORE([$0], [AC_RUN_IFELSE]) + + AC_REQUIRE([AC_GNU_SOURCE]) + AC_REQUIRE([AC_AIX]) + AC_REQUIRE([AC_MINIX]) + + AH_VERBATIM([__EXTENSIONS__], +[/* Enable extensions on Solaris. */ +#ifndef __EXTENSIONS__ +# undef __EXTENSIONS__ +#endif +#ifndef _POSIX_PTHREAD_SEMANTICS +# undef _POSIX_PTHREAD_SEMANTICS +#endif +#ifndef _TANDEM_SOURCE +# undef _TANDEM_SOURCE +#endif]) + AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__], + [ac_cv_safe_to_define___extensions__], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([ +# define __EXTENSIONS__ 1 + AC_INCLUDES_DEFAULT])], + [ac_cv_safe_to_define___extensions__=yes], + [ac_cv_safe_to_define___extensions__=no])]) + test $ac_cv_safe_to_define___extensions__ = yes && + AC_DEFINE([__EXTENSIONS__]) + AC_DEFINE([_POSIX_PTHREAD_SEMANTICS]) + AC_DEFINE([_TANDEM_SOURCE]) +]) + +# gl_USE_SYSTEM_EXTENSIONS +# ------------------------ +# Enable extensions on systems that normally disable them, +# typically due to standards-conformance issues. +AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], + [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])]) |