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Diffstat (limited to 'm4/include_next.m4')
| -rw-r--r-- | m4/include_next.m4 | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/m4/include_next.m4 b/m4/include_next.m4 deleted file mode 100644 index 69ad3dbb..00000000 --- a/m4/include_next.m4 +++ /dev/null @@ -1,223 +0,0 @@ -# include_next.m4 serial 23 -dnl Copyright (C) 2006-2014 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 From Paul Eggert and Derek Price. - -dnl Sets INCLUDE_NEXT and PRAGMA_SYSTEM_HEADER. -dnl -dnl INCLUDE_NEXT expands to 'include_next' if the compiler supports it, or to -dnl 'include' otherwise. -dnl -dnl INCLUDE_NEXT_AS_FIRST_DIRECTIVE expands to 'include_next' if the compiler -dnl supports it in the special case that it is the first include directive in -dnl the given file, or to 'include' otherwise. -dnl -dnl PRAGMA_SYSTEM_HEADER can be used in files that contain #include_next, -dnl so as to avoid GCC warnings when the gcc option -pedantic is used. -dnl '#pragma GCC system_header' has the same effect as if the file was found -dnl through the include search path specified with '-isystem' options (as -dnl opposed to the search path specified with '-I' options). Namely, gcc -dnl does not warn about some things, and on some systems (Solaris and Interix) -dnl __STDC__ evaluates to 0 instead of to 1. The latter is an undesired side -dnl effect; we are therefore careful to use 'defined __STDC__' or '1' instead -dnl of plain '__STDC__'. -dnl -dnl PRAGMA_COLUMNS can be used in files that override system header files, so -dnl as to avoid compilation errors on HP NonStop systems when the gnulib file -dnl is included by a system header file that does a "#pragma COLUMNS 80" (which -dnl has the effect of truncating the lines of that file and all files that it -dnl includes to 80 columns) and the gnulib file has lines longer than 80 -dnl columns. - -AC_DEFUN([gl_INCLUDE_NEXT], -[ - AC_LANG_PREPROC_REQUIRE() - AC_CACHE_CHECK([whether the preprocessor supports include_next], - [gl_cv_have_include_next], - [rm -rf conftestd1a conftestd1b conftestd2 - mkdir conftestd1a conftestd1b conftestd2 - dnl IBM C 9.0, 10.1 (original versions, prior to the 2009-01 updates) on - dnl AIX 6.1 support include_next when used as first preprocessor directive - dnl in a file, but not when preceded by another include directive. Check - dnl for this bug by including <stdio.h>. - dnl Additionally, with this same compiler, include_next is a no-op when - dnl used in a header file that was included by specifying its absolute - dnl file name. Despite these two bugs, include_next is used in the - dnl compiler's <math.h>. By virtue of the second bug, we need to use - dnl include_next as well in this case. - cat <<EOF > conftestd1a/conftest.h -#define DEFINED_IN_CONFTESTD1 -#include_next <conftest.h> -#ifdef DEFINED_IN_CONFTESTD2 -int foo; -#else -#error "include_next doesn't work" -#endif -EOF - cat <<EOF > conftestd1b/conftest.h -#define DEFINED_IN_CONFTESTD1 -#include <stdio.h> -#include_next <conftest.h> -#ifdef DEFINED_IN_CONFTESTD2 -int foo; -#else -#error "include_next doesn't work" -#endif -EOF - cat <<EOF > conftestd2/conftest.h -#ifndef DEFINED_IN_CONFTESTD1 -#error "include_next test doesn't work" -#endif -#define DEFINED_IN_CONFTESTD2 -EOF - gl_save_CPPFLAGS="$CPPFLAGS" - CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2" -dnl We intentionally avoid using AC_LANG_SOURCE here. - AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED[#include <conftest.h>]], - [gl_cv_have_include_next=yes], - [CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2" - AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED[#include <conftest.h>]], - [gl_cv_have_include_next=buggy], - [gl_cv_have_include_next=no]) - ]) - CPPFLAGS="$gl_save_CPPFLAGS" - rm -rf conftestd1a conftestd1b conftestd2 - ]) - PRAGMA_SYSTEM_HEADER= - if test $gl_cv_have_include_next = yes; then - INCLUDE_NEXT=include_next - INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next - if test -n "$GCC"; then - PRAGMA_SYSTEM_HEADER='#pragma GCC system_header' - fi - else - if test $gl_cv_have_include_next = buggy; then - INCLUDE_NEXT=include - INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next - else - INCLUDE_NEXT=include - INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include - fi - fi - AC_SUBST([INCLUDE_NEXT]) - AC_SUBST([INCLUDE_NEXT_AS_FIRST_DIRECTIVE]) - AC_SUBST([PRAGMA_SYSTEM_HEADER]) - AC_CACHE_CHECK([whether system header files limit the line length], - [gl_cv_pragma_columns], - [dnl HP NonStop systems, which define __TANDEM, have this misfeature. - AC_EGREP_CPP([choke me], - [ -#ifdef __TANDEM -choke me -#endif - ], - [gl_cv_pragma_columns=yes], - [gl_cv_pragma_columns=no]) - ]) - if test $gl_cv_pragma_columns = yes; then - PRAGMA_COLUMNS="#pragma COLUMNS 10000" - else - PRAGMA_COLUMNS= - fi - AC_SUBST([PRAGMA_COLUMNS]) -]) - -# gl_CHECK_NEXT_HEADERS(HEADER1 HEADER2 ...) -# ------------------------------------------ -# For each arg foo.h, if #include_next works, define NEXT_FOO_H to be -# '<foo.h>'; otherwise define it to be -# '"///usr/include/foo.h"', or whatever other absolute file name is suitable. -# Also, if #include_next works as first preprocessing directive in a file, -# define NEXT_AS_FIRST_DIRECTIVE_FOO_H to be '<foo.h>'; otherwise define it to -# be -# '"///usr/include/foo.h"', or whatever other absolute file name is suitable. -# That way, a header file with the following line: -# #@INCLUDE_NEXT@ @NEXT_FOO_H@ -# or -# #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_FOO_H@ -# behaves (after sed substitution) as if it contained -# #include_next <foo.h> -# even if the compiler does not support include_next. -# The three "///" are to pacify Sun C 5.8, which otherwise would say -# "warning: #include of /usr/include/... may be non-portable". -# Use '""', not '<>', so that the /// cannot be confused with a C99 comment. -# Note: This macro assumes that the header file is not empty after -# preprocessing, i.e. it does not only define preprocessor macros but also -# provides some type/enum definitions or function/variable declarations. -# -# This macro also checks whether each header exists, by invoking -# AC_CHECK_HEADERS_ONCE or AC_CHECK_HEADERS on each argument. -AC_DEFUN([gl_CHECK_NEXT_HEADERS], -[ - gl_NEXT_HEADERS_INTERNAL([$1], [check]) -]) - -# gl_NEXT_HEADERS(HEADER1 HEADER2 ...) -# ------------------------------------ -# Like gl_CHECK_NEXT_HEADERS, except do not check whether the headers exist. -# This is suitable for headers like <stddef.h> that are standardized by C89 -# and therefore can be assumed to exist. -AC_DEFUN([gl_NEXT_HEADERS], -[ - gl_NEXT_HEADERS_INTERNAL([$1], [assume]) -]) - -# The guts of gl_CHECK_NEXT_HEADERS and gl_NEXT_HEADERS. -AC_DEFUN([gl_NEXT_HEADERS_INTERNAL], -[ - AC_REQUIRE([gl_INCLUDE_NEXT]) - AC_REQUIRE([AC_CANONICAL_HOST]) - - m4_if([$2], [check], - [AC_CHECK_HEADERS_ONCE([$1]) - ]) - -dnl FIXME: gl_next_header and gl_header_exists must be used unquoted -dnl until we can assume autoconf 2.64 or newer. - m4_foreach_w([gl_HEADER_NAME], [$1], - [AS_VAR_PUSHDEF([gl_next_header], - [gl_cv_next_]m4_defn([gl_HEADER_NAME])) - if test $gl_cv_have_include_next = yes; then - AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>']) - else - AC_CACHE_CHECK( - [absolute name of <]m4_defn([gl_HEADER_NAME])[>], - m4_defn([gl_next_header]), - [m4_if([$2], [check], - [AS_VAR_PUSHDEF([gl_header_exists], - [ac_cv_header_]m4_defn([gl_HEADER_NAME])) - if test AS_VAR_GET(gl_header_exists) = yes; then - AS_VAR_POPDEF([gl_header_exists]) - ]) - gl_ABSOLUTE_HEADER_ONE(gl_HEADER_NAME) - AS_VAR_COPY([gl_header], [gl_cv_absolute_]AS_TR_SH(gl_HEADER_NAME)) - AS_VAR_SET(gl_next_header, ['"'$gl_header'"']) - m4_if([$2], [check], - [else - AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>']) - fi - ]) - ]) - fi - AC_SUBST( - AS_TR_CPP([NEXT_]m4_defn([gl_HEADER_NAME])), - [AS_VAR_GET(gl_next_header)]) - if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then - # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next' - gl_next_as_first_directive='<'gl_HEADER_NAME'>' - else - # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include' - gl_next_as_first_directive=AS_VAR_GET(gl_next_header) - fi - AC_SUBST( - AS_TR_CPP([NEXT_AS_FIRST_DIRECTIVE_]m4_defn([gl_HEADER_NAME])), - [$gl_next_as_first_directive]) - AS_VAR_POPDEF([gl_next_header])]) -]) - -# Autoconf 2.68 added warnings for our use of AC_COMPILE_IFELSE; -# this fallback is safe for all earlier autoconf versions. -m4_define_default([AC_LANG_DEFINES_PROVIDED]) |