mirror of
git://git.sv.gnu.org/autoconf
synced 2024-12-21 02:28:54 +08:00
419 lines
9.3 KiB
Plaintext
419 lines
9.3 KiB
Plaintext
# -*- autoconf -*-
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cat <<EOF
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Semantics.
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EOF
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# AC_TRY_LINK_FUNC
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# ----------------
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AT_CHECK_MACRO(AC_TRY_LINK_FUNC,
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[AC_TRY_LINK_FUNC(exit,, exit 1)
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AC_TRY_LINK_FUNC(Be_doomed_if_your_libc_has_a_function_named_like_this,
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exit 1)])
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## -------------------------------- ##
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## Members of the AC_CHECK family. ##
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## -------------------------------- ##
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# AC_CHECK_LIB
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# ------------
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# Well, I can't imagine a system where `cos' is neither in libc, nor
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# in libm. Nor can I imagine a lib more likely to exists than libm.
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# But there are systems without libm, on which we don't want to have
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# this test fail, so exit successfully if `cos' is in libc.
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AT_CHECK_MACRO(AC_CHECK_LIB,
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[AC_TRY_LINK_FUNC(cos, exit 0)
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AC_CHECK_LIB(m, cos,, exit 1)])
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# AC_CHECK_DECLS
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# --------------
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# Check that it performs the correct actions:
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# Must define NEED_NO_DECL, but not NEED_YES_DECL.
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AT_CHECK_MACRO(AC_CHECK_DECLS,
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[[AC_CHECK_DECLS([yes, no],,,
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[int yes = 1;])]],
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[AT_CHECK_DEFINES(
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[#define HAVE_DECL_NO 0
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#define HAVE_DECL_YES 1
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])])
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# AC_CHECK_FUNCS
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# --------------
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# Check that it performs the correct actions:
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# Must define HAVE_EXIT, but not HAVE_AUTOCONF_TIXE
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AT_CHECK_MACRO(AC_CHECK_FUNCS,
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[AC_CHECK_FUNCS(exit autoconf_tixe)],
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[AT_CHECK_DEFINES(
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[/* #undef HAVE_AUTOCONF_TIXE */
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#define HAVE_EXIT 1
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])])
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# AC_CHECK_HEADERS
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# ----------------
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# Check that it performs the correct actions:
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# Must define HAVE_STDIO_H, but not HAVE_AUTOCONF_IO_H.
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AT_CHECK_MACRO(AC_CHECK_HEADERS,
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[AC_CHECK_HEADERS(stdio.h autoconf_io.h)],
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[AT_CHECK_DEFINES(
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[/* #undef HAVE_AUTOCONF_IO_H */
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#define HAVE_STDIO_H 1
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])])
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# AC_CHECK_MEMBERS
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# ----------------
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# Check that it performs the correct actions.
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# Must define HAVE_STRUCT_YES_S_YES, but not HAVE_STRUCT_YES_S_NO.
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AT_CHECK_MACRO(AC_CHECK_MEMBERS,
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[[AC_CHECK_MEMBERS([struct yes_s.yes, struct yes_s.no],,,
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[struct yes_s { int yes ;} ;])]],
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[AT_CHECK_DEFINES(
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[/* #undef HAVE_STRUCT_YES_S_NO */
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#define HAVE_STRUCT_YES_S_YES 1
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])])
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# AC_CHECK_SIZEOF
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# ---------------
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AT_CHECK_MACRO(AC_CHECK_SIZEOF,
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[AC_CHECK_SIZEOF(char)
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AC_CHECK_SIZEOF(charchar,,
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[#include <stdio.h>
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typedef struct
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{
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char a;
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char b;
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} charchar;])
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AC_CHECK_SIZEOF(charcharchar)
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# Exercize the code used when cross-compiling
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cross_compiling=yes
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AC_CHECK_SIZEOF(unsigned char)
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AC_CHECK_SIZEOF(ucharchar,,
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[#include <stdio.h>
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typedef struct
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{
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unsigned char a;
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unsigned char b;
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} ucharchar;])
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AC_CHECK_SIZEOF(ucharcharchar)],
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[AT_CHECK_DEFINES(
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[#define SIZEOF_CHAR 1
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#define SIZEOF_CHARCHAR 2
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#define SIZEOF_CHARCHARCHAR 0
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#define SIZEOF_UCHARCHAR 2
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#define SIZEOF_UCHARCHARCHAR 0
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#define SIZEOF_UNSIGNED_CHAR 1
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])])
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# AC_CHECK_TYPES
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# --------------
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# Check that it performs the correct actions.
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# Must define HAVE_STRUCT_YES_S, HAVE_INT, but not HAVE_STRUCT_NO_S.
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# `int' and `struct yes_s' are both checked to test both the compiler
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# builtin types, and defined types.
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AT_CHECK_MACRO(AC_CHECK_TYPES,
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[[AC_CHECK_TYPES([int, struct yes_s, struct no_s],,,
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[struct yes_s { int yes ;} ;])]],
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[AT_CHECK_DEFINES(
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[#define HAVE_INT 1
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/* #undef HAVE_STRUCT_NO_S */
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#define HAVE_STRUCT_YES_S 1
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])])
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# AC_CHECK_TYPES
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# --------------
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# Check that we properly dispatch properly to the old implementation
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# or to the new one.
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AT_SETUP([AC_CHECK_TYPES])
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AT_DATA(configure.in,
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[[AC_INIT
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define([_AC_CHECK_TYPE_NEW], [NEW])
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define([_AC_CHECK_TYPE_OLD], [OLD])
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#(cut-from-here
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AC_CHECK_TYPE(ptrdiff_t)
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AC_CHECK_TYPE(ptrdiff_t, int)
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AC_CHECK_TYPE(quad, long long)
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AC_CHECK_TYPE(table_42, [int[42]])
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# Nice machine!
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AC_CHECK_TYPE(uint8_t, uint65536_t)
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AC_CHECK_TYPE(a,b,c,d)
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#to-here)
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AC_OUTPUT
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]])
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AT_CHECK([../autoconf --autoconf-dir .. -l $at_srcdir], 0,,
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[configure.in:10: warning: AC_CHECK_TYPE: assuming `uint65536_t' is not a type
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])
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AT_CHECK([[sed -e '/^#(cut-from-here/,/^#to-here)/!d' -e '/^#/d' configure]],
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0,
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[NEW
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OLD
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OLD
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OLD
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NEW
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NEW
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])
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AT_CLEANUP(autoconf.err)
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# AC_CHECK_FILES
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# --------------
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# FIXME: To really test HAVE_AC_EXISTS2 and HAVE_AC_MISSING2 we need to
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# open AH_TEMPLATE to `configure.in', which is not yet the case.
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AT_CHECK_MACRO(AC_CHECK_FILES,
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[touch ac-exists1 ac-exists2
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ac_exists2=ac-exists2
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ac_missing2=ac-missing2
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AC_CHECK_FILES(ac-exists1 ac-missing1 $ac_exists2 $ac_missing2)
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rm ac-exists1 ac-exists2],
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[AT_CHECK_DEFINES(
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[#define HAVE_AC_EXISTS1 1
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/* #undef HAVE_AC_MISSING1 */
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])])
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## ------------------------------ ##
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## AC_CHECK_PROG & AC_PATH_PROG. ##
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## ------------------------------ ##
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AT_SETUP(AC_CHECK_PROG & AC_PATH_PROG)
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# Create a sub directory `path' with 6 subdirs which all 7 contain
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# an executable `tool'. `6' contains a `better' tool.
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mkdir path
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cat >path/tool <<\EOF
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#! /bin/sh
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exit 0
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EOF
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chmod +x path/tool
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for i in 1 2 3 4 5 6
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do
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mkdir path/$i
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cp path/tool path/$i
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done
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cp path/tool path/6/better
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# -------------------------------- #
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# AC_CHECK_PROG & AC_CHECK_PROGS. #
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# -------------------------------- #
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AT_DATA(configure.in,
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[[AC_INIT
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pwd=`pwd`
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path=`echo "1:2:3:4:5:6" | sed -e 's,\([[0-9]]\),'"$pwd"'/path/\1,g'`
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fail=0
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AC_CHECK_PROG(TOOL1, tool, found, not-found, $path)
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test "$TOOL1" = found || fail=1
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# Yes, the semantics of this macro is weird.
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AC_CHECK_PROG(TOOL2, tool,, not-found, $path)
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test "$TOOL2" = not-found || fail=1
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AC_CHECK_PROG(TOOL3, tool, tool, not-found, $path, $pwd/path/1/tool)
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test "$TOOL3" = $pwd/path/2/tool || fail=1
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AC_CHECK_PROG(TOOL4, better, better, not-found, $path, $pwd/path/1/tool)
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test "$TOOL4" = better || fail=1
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# When a tool is not found, and no value is given for not-found,
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# the variable is left empty.
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AC_CHECK_PROGS(TOOL5, missing,, $path)
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test -z "$TOOL5" || fail=1
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AC_CHECK_PROGS(TOOL6, missing tool better,, $path)
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test "$TOOL6" = tool || fail=1
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# no AC_OUTPUT, we don't need config.status.
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exit $fail
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]])
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AT_CHECK([../autoconf --autoconf-dir .. -l $at_srcdir], 0,, ignore)
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AT_CHECK([./configure], 0, ignore)
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# ------------------------------ #
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# AC_PATH_PROG & AC_PATH_PROGS. #
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# ------------------------------ #
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AT_DATA(configure.in,
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[[AC_INIT
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pwd=`pwd`
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path=`echo "1:2:3:4:5:6" | sed -e 's,\([[0-9]]\),'"$pwd"'/path/\1,g'`
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fail=0
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AC_PATH_PROG(TOOL1, tool, not-found, $path)
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test "$TOOL1" = $pwd/path/1/tool || fail=1
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AC_PATH_PROG(TOOL2, better, not-found, $path)
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test "$TOOL2" = $pwd/path/6/better || fail=1
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# When a tool is not found, and no value is given for not-found,
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# the variable is left empty.
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AC_PATH_PROGS(TOOL3, missing,, $path)
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test -z "$TOOL3" || fail=1
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AC_PATH_PROGS(TOOL4, missing tool better,, $path)
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test "$TOOL4" = $pwd/path/1/tool || fail=1
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# no AC_OUTPUT, we don't need config.status.
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exit $fail
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]])
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AT_CHECK([../autoconf --autoconf-dir .. -l $at_srcdir], 0,, ignore)
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AT_CHECK([./configure], 0, ignore)
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AT_CLEANUP(path config.log config.cache configure)
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## ----------------- ##
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## Specific macros. ##
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## ----------------- ##
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# C compiler
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# ----------
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# GCC supports `const', `volatile', and `inline'.
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AT_CHECK_MACRO(C keywords,
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[[AC_PROG_CC
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AC_C_CONST
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AC_C_INLINE
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AC_C_VOLATILE
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case "$GCC,$ac_cv_c_const,$ac_cv_c_inline,$ac_cv_c_volatile" in
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yes,*no*) exit 1;;
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esac]])
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## ------------- ##
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## AC_PROG_CPP. ##
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## ------------- ##
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# It's Ok for strict preprocessors to produce warnings.
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AT_SETUP([AC_PROG_CPP with warnings])
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AT_DATA([mycpp],
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[[#! /bin/sh
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echo noise >&2
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${1+"$@"}
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exit $?
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]])
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chmod +x mycpp
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_AT_CHECK_AC_MACRO(
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[AC_PROG_CPP
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# If the preprocessor is not strict, just ignore
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test "x$ac_c_preproc_warn_flag" = xyes && exit 77
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CPP="./mycpp $CPP"
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AC_CHECK_HEADERS(stdio.h autoconf_io.h)])
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AT_CHECK_DEFINES(
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[/* #undef HAVE_AUTOCONF_IO_H */
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#define HAVE_STDIO_H 1
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])
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AT_CLEANUP(configure config.status config.log config.cache config.hin config.h env-after)dnl
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# Non-strict preprocessors work if they produce no warnings.
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AT_SETUP([AC_PROG_CPP without warnings])
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AT_DATA([mycpp],
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[[#! /bin/sh
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/lib/cpp ${1+"$@"}
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exit 0
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]])
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chmod +x mycpp
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_AT_CHECK_AC_MACRO(
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[# Ignore if /lib/cpp doesn't work
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/lib/cpp </dev/null >/dev/null 2>&1 || exit 77
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CPP=./mycpp
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AC_PROG_CPP
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test "x$ac_c_preproc_warn_flag" != xyes && exit 1
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AC_CHECK_HEADERS(stdio.h autoconf_io.h)])
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AT_CHECK_DEFINES(
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[/* #undef HAVE_AUTOCONF_IO_H */
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#define HAVE_STDIO_H 1
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])
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AT_CLEANUP(configure config.status config.log config.cache config.hin config.h env-after)dnl
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## ------------- ##
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## Base macros. ##
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## ------------- ##
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AT_SETUP([AC_CONFIG_FILES, HEADERS, LINKS and COMMANDS])
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AT_DATA(configure.in,
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[[AC_INIT
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rm -rf header file link command
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touch header.in file.in link.in command.in
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case $what_to_test in
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header) AC_CONFIG_HEADERS(header:header.in);;
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file) AC_CONFIG_FILES(file:file.in);;
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command) AC_CONFIG_COMMANDS(command:command.in, [cp command.in command]);;
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link) AC_CONFIG_LINKS(link:link.in);;
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esac
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AC_OUTPUT
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]])
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AT_CHECK([../autoconf --autoconf-dir .. -l $at_srcdir], 0,, ignore)
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# Create a header
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AT_CHECK([./configure what_to_test=header], 0, ignore)
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AT_CHECK([ls header file command link 2>/dev/null], [], [header
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])
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# Create a file
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AT_CHECK([./configure what_to_test=file], 0, ignore)
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AT_CHECK([ls header file command link 2>/dev/null], [], [file
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])
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# Execute a command
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AT_CHECK([./configure what_to_test=command], 0, ignore)
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AT_CHECK([ls header file command link 2>/dev/null], [], [command
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])
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# Create a link
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AT_CHECK([./configure what_to_test=link], 0, ignore)
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AT_CHECK([ls header file command link 2>/dev/null], [], [link
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])
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AT_CLEANUP(header file link command header.in file.in link.in command.in configure config.status)
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