# Autoconf M4 include file defining utility macros for complex Canadian # cross builds. dnl #### dnl # _GCC_TOPLEV_NONCANONICAL_BUILD dnl # $build_alias or canonical $build if blank. dnl # Used when we would use $build_alias, but empty is not OK. AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_BUILD], [AC_REQUIRE([AC_CANONICAL_BUILD]) []dnl case ${build_alias} in "") build_noncanonical=${build} ;; *) build_noncanonical=${build_alias} ;; esac ]) []dnl # _GCC_TOPLEV_NONCANONICAL_BUILD dnl #### dnl # _GCC_TOPLEV_NONCANONICAL_HOST dnl # $host_alias, or $build_noncanonical if blank. dnl # Used when we would use $host_alias, but empty is not OK. AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_HOST], [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl case ${host_alias} in "") host_noncanonical=${build_noncanonical} ;; *) host_noncanonical=${host_alias} ;; esac ]) []dnl # _GCC_TOPLEV_NONCANONICAL_HOST dnl #### dnl # _GCC_TOPLEV_NONCANONICAL_TARGET dnl # $target_alias or $host_noncanonical if blank. dnl # Used when we would use $target_alias, but empty is not OK. AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_TARGET], [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl case ${target_alias} in "") target_noncanonical=${host_noncanonical} ;; *) target_noncanonical=${target_alias} ;; esac ]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET dnl #### dnl # ACX_NONCANONICAL_BUILD dnl # Like underscored version, but AC_SUBST's. AC_DEFUN([ACX_NONCANONICAL_BUILD], [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl AC_SUBST(build_noncanonical) ]) []dnl # ACX_NONCANONICAL_BUILD dnl #### dnl # ACX_NONCANONICAL_HOST dnl # Like underscored version, but AC_SUBST's. AC_DEFUN([ACX_NONCANONICAL_HOST], [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl AC_SUBST(host_noncanonical) ]) []dnl # ACX_NONCANONICAL_HOST dnl #### dnl # ACX_NONCANONICAL_TARGET dnl # Like underscored version, but AC_SUBST's. AC_DEFUN([ACX_NONCANONICAL_TARGET], [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl AC_SUBST(target_noncanonical) ]) []dnl # ACX_NONCANONICAL_TARGET dnl #### dnl # GCC_TOPLEV_SUBDIRS dnl # GCC & friends build 'build', 'host', and 'target' tools. These must dnl # be separated into three well-known subdirectories of the build directory: dnl # build_subdir, host_subdir, and target_subdir. The values are determined dnl # here so that they can (theoretically) be changed in the future. They dnl # were previously reproduced across many different files. dnl # dnl # This logic really amounts to very little with autoconf 2.13; it will dnl # amount to a lot more with autoconf 2.5x. AC_DEFUN([GCC_TOPLEV_SUBDIRS], [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl # Prefix 'build-' so this never conflicts with target_subdir. build_subdir="build-${build_noncanonical}" # --srcdir=. covers the toplevel, while "test -d" covers the subdirectories if ( test $srcdir = . && test -d gcc ) \ || test -d $srcdir/../host-${host_noncanonical}; then host_subdir="host-${host_noncanonical}" else host_subdir=. fi # No prefix. target_subdir=${target_noncanonical} AC_SUBST([build_subdir]) []dnl AC_SUBST([host_subdir]) []dnl AC_SUBST([target_subdir]) []dnl ]) []dnl # GCC_TOPLEV_SUBDIRS #### # _NCN_TOOL_PREFIXES: Some stuff that oughtta be done in AC_CANONICAL_SYSTEM # or AC_INIT. # These demand that AC_CANONICAL_SYSTEM be called beforehand. AC_DEFUN([_NCN_TOOL_PREFIXES], [ncn_tool_prefix= test -n "$host_alias" && ncn_tool_prefix=$host_alias- ncn_target_tool_prefix= test -n "$target_alias" && ncn_target_tool_prefix=$target_alias- ]) []dnl # _NCN_TOOL_PREFIXES #### # NCN_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path]) # Like AC_CHECK_TOOL, but tries a prefix of the target, not the host. # Code is pretty much lifted from autoconf2.53. AC_DEFUN([NCN_CHECK_TARGET_TOOL], [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl if test -n "$ncn_target_tool_prefix"; then AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2], [${ncn_target_tool_prefix}$2], , [$4]) fi if test -z "$ac_cv_prog_$1" ; then ncn_cv_$1=$$1 AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [$3], [$4]) $1=$ncn_cv_$1 else $1="$ac_cv_prog_$1" fi ]) []dnl # NCN_CHECK_TARGET_TOOL #### # NCN_STRICT_CHECK_TOOL(variable, prog-to-check-for,[value-if-not-found],[path]) # Like AC_CHECK_TOOL, but requires the prefix if build!=host. AC_DEFUN([NCN_STRICT_CHECK_TOOL], [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl if test -n "$ncn_tool_prefix"; then AC_CHECK_PROG([$1], [${ncn_tool_prefix}$2], [${ncn_tool_prefix}$2], , [$4]) fi if test -z "$ac_cv_prog_$1" ; then if test $build = $host ; then ncn_cv_$1=$$1 AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4]) $1=$ncn_cv_$1 else $1="ifelse([$3],[],[${ncn_tool_prefix}$2],[$3])" fi else $1="$ac_cv_prog_$1" fi ]) []dnl # NCN_STRICT_CHECK_TOOL #### # NCN_STRICT_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path]) # Like NCN_CHECK_TARGET_TOOL, but requires the prefix if build!=target. AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOL], [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl if test -n "$ncn_target_tool_prefix"; then AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2], [${ncn_target_tool_prefix}$2], , [$4]) fi if test -z "$ac_cv_prog_$1" ; then if test $build = $target ; then ncn_cv_$1=$$1 AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4]) $1=$ncn_cv_$1 else $1="ifelse([$3],[],[${ncn_target_tool_prefix}$2],[$3])" fi else $1="$ac_cv_prog_$1" fi ]) []dnl # NCN_STRICT_CHECK_TARGET_TOOL ### # AC_PROG_CPP_WERROR # Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which # triggers warnings from the preprocessor. Will be in autoconf 2.58. # For now, using this also overrides header checks to use only the # preprocessor (matches 2.13 behavior; matching 2.58's behavior is a # bit harder from here). # Eventually autoconf will default to checking headers with the compiler # instead, and we'll have to do this differently. AC_DEFUN([AC_PROG_CPP_WERROR], [AC_REQUIRE([AC_PROG_CPP])dnl m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD])) ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR # Test for GNAT. # We require the gnatbind program, and a compiler driver that # understands Ada. We use the user's CC setting, already found. # # Sets the shell variable have_gnat to yes or no as appropriate, and # substitutes GNATBIND. AC_DEFUN([ACX_PROG_GNAT], [AC_REQUIRE([AC_CHECK_TOOL_PREFIX]) AC_REQUIRE([AC_PROG_CC]) AC_CHECK_TOOL(GNATBIND, gnatbind, no) AC_CACHE_CHECK([whether compiler driver understands Ada], acx_cv_cc_gcc_supports_ada, [cat >conftest.adb <&1 || echo failure` if test x"$errors" = x && test -f conftest.$ac_objext; then acx_cv_cc_gcc_supports_ada=yes break fi rm -f conftest.*]) if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then have_gnat=yes else have_gnat=no fi ]) dnl 'make compare' can be significantly faster, if cmp itself can dnl skip bytes instead of using tail. The test being performed is dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2" dnl but we need to sink errors and handle broken shells. We also test dnl for the parameter format "cmp file1 file2 skip1 skip2" which is dnl accepted by cmp on some systems. AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL], [AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip, [ echo abfoo >t1 echo cdfoo >t2 gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2' if cmp t1 t2 2 2 > /dev/null 2>&1; then if cmp t1 t2 1 1 > /dev/null 2>&1; then : else gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16' fi fi if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then : else gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2' fi fi rm t1 t2 ]) do_compare="$gcc_cv_prog_cmp_skip" AC_SUBST(do_compare) ]) dnl See whether we can include both string.h and strings.h. AC_DEFUN([ACX_HEADER_STRING], [AC_CACHE_CHECK([whether string.h and strings.h may both be included], gcc_cv_header_string, [AC_TRY_COMPILE([#include #include ], , gcc_cv_header_string=yes, gcc_cv_header_string=no)]) if test $gcc_cv_header_string = yes; then AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both and .]) fi ]) dnl See if stdbool.h properly defines bool and true/false. dnl Check whether _Bool is built-in. AC_DEFUN([ACX_HEADER_STDBOOL], [AC_CACHE_CHECK([for working stdbool.h], ac_cv_header_stdbool_h, [AC_TRY_COMPILE([#include ], [bool foo = false;], ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)]) if test $ac_cv_header_stdbool_h = yes; then AC_DEFINE(HAVE_STDBOOL_H, 1, [Define if you have a working header file.]) fi AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool, [AC_TRY_COMPILE(, [_Bool foo;], gcc_cv_c__bool=yes, gcc_cv_c__bool=no) ]) if test $gcc_cv_c__bool = yes; then AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.]) fi ]) dnl See if hard links work and if not, try to substitute $1 or simple copy. AC_DEFUN([ACX_PROG_LN], [AC_MSG_CHECKING(whether ln works) AC_CACHE_VAL(acx_cv_prog_LN, [rm -f conftestdata_t echo >conftestdata_f if ln conftestdata_f conftestdata_t 2>/dev/null then acx_cv_prog_LN=ln else acx_cv_prog_LN=no fi rm -f conftestdata_f conftestdata_t ])dnl if test $acx_cv_prog_LN = no; then LN="ifelse([$1],,cp,[$1])" AC_MSG_RESULT([no, using $LN]) else LN="$acx_cv_prog_LN" AC_MSG_RESULT(yes) fi AC_SUBST(LN)dnl ])