278 lines
5.6 KiB
Plaintext
278 lines
5.6 KiB
Plaintext
# -*- autoconf -*-
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AT_BANNER([Low level compiling/preprocessing macros.])
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# Since the macros which compile are required by most tests, check
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# them first. But remember that looking for a compiler is even more
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# primitive, so check those first.
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## ------------------------------------- ##
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## AC_LANG, AC_LANG_PUSH & AC_LANG_POP. ##
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## ------------------------------------- ##
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AT_SETUP([AC_LANG, AC_LANG_PUSH & AC_LANG_POP])
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AT_DATA([configure.ac],
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[[AC_INIT
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# C
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AC_LANG(C)
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# C
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AC_LANG_PUSH(C)
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# C C
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AC_LANG_PUSH(C++)
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# C++ C C
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AC_LANG(C++)
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# C++ C C
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AC_LANG_PUSH(Fortran 77)
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# F77 C++ C C
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AC_LANG_POP(Fortran 77)
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# C++ C C
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AC_LANG(C++)
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# C++ C C
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AC_LANG_POP(C++)
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# C C
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AC_LANG_POP(C)
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# C
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]])
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AT_CHECK_AUTOCONF
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AT_CHECK([sed -n 's/^ac_ext=//p' configure], 0,
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[c
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c
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c
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cc
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cc
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f
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cc
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cc
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c
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c
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])
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AT_CLEANUP
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## ------------ ##
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## Extensions. ##
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## ------------ ##
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# As far as we know only `foo', `foo.exe' are possible executable,
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# and `foo.o', `foo.obj' are possible object files. Autoconf must not
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# know that, but it is OK for the test suite to take this into account.
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AT_CHECK_MACRO([Extensions],
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[[AC_PROG_CC
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case $ac_exeext in
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'' | '.exe' ) ;;
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* ) AC_MSG_ERROR([suspicious executable suffix: $ac_exeext]);;
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esac
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case $ac_objext in
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'o' | 'obj' ) ;;
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* ) AC_MSG_ERROR([suspicious object suffix: $ac_objext]);;
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esac
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AS_EXIT([0])
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]])
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## -------------------------- ##
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## Broken/missing compilers. ##
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## -------------------------- ##
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# Check that Autoconf correctly diagnoses broken compilers, and in
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# particular, if it does not exit 77, the test suite is in trouble...
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# FIXME: Once a precise message decided, check stderr of configure.
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AT_SETUP([Broken/missing compilers])
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AT_DATA([configure.ac],
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[[AC_INIT
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CC=no-such-compiler
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AC_PROG_CC
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]])
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AT_CHECK_AUTOCONF
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AT_CHECK_CONFIGURE([], 77, ignore, ignore)
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AT_CLEANUP
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## ------------ ##
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## C keywords. ##
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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*)
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AC_MSG_ERROR([failed to detect `const', `inline' or `volatile' support]);;
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esac
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]])
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## --------------------------------- ##
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## AC_PROG_CPP requires AC_PROG_CC. ##
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## --------------------------------- ##
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# Must invoke AC_PROG_CC.
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AT_CHECK_MACRO([AC_PROG_CPP requires AC_PROG_CC],
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[[AC_PROG_CPP
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test -z "$CC" &&
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AC_MSG_ERROR([looked for a C preprocessor without looking for a compiler])
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]])
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## --------------------------- ##
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## AC_PROG_CPP with warnings. ##
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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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exec ${1+"$@"}
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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 &&
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AC_MSG_ERROR([preprocessor has no warning option], 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
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## ------------------------------ ##
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## AC_PROG_CPP without warnings. ##
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## ------------------------------ ##
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AT_SETUP([AC_PROG_CPP without warnings])
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# Ignore if /lib/cpp doesn't work
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AT_CHECK([/lib/cpp </dev/null || exit 77], [], [ignore], [ignore])
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# A cpp which exit status is meaningless.
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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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[[CPP=./mycpp
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AC_PROG_CPP
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test "x$ac_c_preproc_warn_flag" != xyes &&
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AC_MSG_ERROR([failed to detect preprocessor warning option])
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AC_CHECK_HEADERS(stdio.h autoconf_io.h)]])
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AT_CHECK_DEFINES(
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[/* #undef HAVE_AUTOCONF_IO_H */
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#define HAVE_STDIO_H 1
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])
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AT_CLEANUP
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## -------------------- ##
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## AC_PROG_CPP via CC. ##
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## -------------------- ##
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# It's Ok for strict preprocessors to produce warnings.
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AT_SETUP([AC_PROG_CPP via CC])
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# Ignore if /lib/cpp doesn't work
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AT_CHECK([/lib/cpp </dev/null || exit 77], [], [ignore], [ignore])
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AT_DATA([mycc],
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[[#! /bin/sh
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echo "Annoying copyright message" >&2
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exec "$@"
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]])
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chmod +x mycc
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# We go through the following contortions, in order to have the
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# configure script go down the same codepaths as it would during a
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# normal CPP selection check. If we explicitly set CPP, it goes down
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# a different codepath.
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_AT_CHECK_AC_MACRO(
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[[AC_PROG_CC
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CC="./mycc $CC"
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AC_PROG_CPP
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# The test $CC compiler should have been selected.
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test "$CPP" != "$CC -E" &&
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AC_MSG_ERROR([error messages on stderr cause the preprocessor selection to fail])
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# Exercise CPP.
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AC_CHECK_HEADERS(stdio.h autoconf_io.h)]])
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AT_CHECK_DEFINES(
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[/* #undef HAVE_AUTOCONF_IO_H */
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#define HAVE_STDIO_H 1
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])
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AT_CLEANUP
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## ------------------ ##
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## AC_TRY_LINK_FUNC. ##
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## ------------------ ##
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AT_CHECK_MACRO([AC_TRY_LINK_FUNC],
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[AC_TRY_LINK_FUNC(printf,,
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[AC_MSG_ERROR([cannot find `printf'])])
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AC_TRY_LINK_FUNC(Be_doomed_if_your_libc_has_a_function_named_like_this,
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[AC_MSG_ERROR([found a nonexistent function])])])
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## --------------------- ##
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## Fortran 77 Compiler. ##
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## --------------------- ##
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AT_CHECK_MACRO([GNU Fortran 77],
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[[AC_LANG(Fortran 77)
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AC_LANG_COMPILER
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if AC_TRY_COMMAND([$F77 --version | grep GNU >&2]); then
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# Be sure to remove files which might be created by compilers that
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# don't support --version.
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rm -f a.exe a.out
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# Has GNU in --version.
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test "$G77" != yes &&
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AC_MSG_ERROR([failed to recognize GNU Fortran 77 compiler])
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else
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# Be sure to remove files which might be created by compilers that
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# don't support --version.
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rm -f a.exe a.out
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# Has not.
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test "$G77" = yes &&
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AC_MSG_ERROR([incorrectly recognized a GNU Fortran 77 compiler])
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fi]])
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