diff options
Diffstat (limited to 'm4/build-to-host.m4')
| -rw-r--r-- | m4/build-to-host.m4 | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/m4/build-to-host.m4 b/m4/build-to-host.m4 new file mode 100644 index 00000000..d5ec3153 --- /dev/null +++ b/m4/build-to-host.m4 @@ -0,0 +1,106 @@ +# build-to-host.m4 serial 30 +dnl Copyright (C) 2023-2024 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 Bruno Haible. + +dnl When the build environment ($build_os) is different from the target runtime +dnl environment ($host_os), file names may need to be converted from the build +dnl environment syntax to the target runtime environment syntax. This is +dnl because the Makefiles are executed (mostly) by build environment tools and +dnl therefore expect file names in build environment syntax, whereas the runtime +dnl expects file names in target runtime environment syntax. +dnl +dnl For example, if $build_os = cygwin and $host_os = mingw32, filenames need +dnl be converted from Cygwin syntax to native Windows syntax: +dnl /cygdrive/c/foo/bar -> C:\foo\bar +dnl /usr/local/share -> C:\cygwin64\usr\local\share +dnl +dnl gl_BUILD_TO_HOST([somedir]) +dnl This macro takes as input an AC_SUBSTed variable 'somedir', which must +dnl already have its final value assigned, and produces two additional +dnl AC_SUBSTed variables 'somedir_c' and 'somedir_c_make', that designate the +dnl same file name value, just in different syntax: +dnl - somedir_c is the file name in target runtime environment syntax, +dnl as a C string (starting and ending with a double-quote, +dnl and with escaped backslashes and double-quotes in +dnl between). +dnl - somedir_c_make is the same thing, escaped for use in a Makefile. + +AC_DEFUN([gl_BUILD_TO_HOST], +[ + AC_REQUIRE([AC_CANONICAL_BUILD]) + AC_REQUIRE([AC_CANONICAL_HOST]) + AC_REQUIRE([gl_BUILD_TO_HOST_INIT]) + + dnl Define somedir_c. + gl_final_[$1]="$[$1]" + gl_[$1]_prefix=`echo $gl_am_configmake | sed "s/.*\.//g"` + dnl Translate it from build syntax to host syntax. + case "$build_os" in + cygwin*) + case "$host_os" in + mingw* | windows*) + gl_final_[$1]=`cygpath -w "$gl_final_[$1]"` ;; + esac + ;; + esac + dnl Convert it to C string syntax. + [$1]_c=`printf '%s\n' "$gl_final_[$1]" | sed -e "$gl_sed_double_backslashes" -e "$gl_sed_escape_doublequotes" | tr -d "$gl_tr_cr"` + [$1]_c='"'"$[$1]_c"'"' + AC_SUBST([$1_c]) + + dnl Define somedir_c_make. + [$1]_c_make=`printf '%s\n' "$[$1]_c" | sed -e "$gl_sed_escape_for_make_1" -e "$gl_sed_escape_for_make_2" | tr -d "$gl_tr_cr"` + dnl Use the substituted somedir variable, when possible, so that the user + dnl may adjust somedir a posteriori when there are no special characters. + if test "$[$1]_c_make" = '\"'"${gl_final_[$1]}"'\"'; then + [$1]_c_make='\"$([$1])\"' + fi + if test "x$gl_am_configmake" != "x"; then + gl_[$1]_config='sed \"r\n\" $gl_am_configmake | eval $gl_path_map | $gl_[$1]_prefix -d 2>/dev/null' + else + gl_[$1]_config='' + fi + _LT_TAGDECL([], [gl_path_map], [2])dnl + _LT_TAGDECL([], [gl_[$1]_prefix], [2])dnl + _LT_TAGDECL([], [gl_am_configmake], [2])dnl + _LT_TAGDECL([], [[$1]_c_make], [2])dnl + _LT_TAGDECL([], [gl_[$1]_config], [2])dnl + AC_SUBST([$1_c_make]) + + dnl If the host conversion code has been placed in $gl_config_gt, + dnl instead of duplicating it all over again into config.status, + dnl then we will have config.status run $gl_config_gt later, so it + dnl needs to know what name is stored there: + AC_CONFIG_COMMANDS([build-to-host], [eval $gl_config_gt | $SHELL 2>/dev/null], [gl_config_gt="eval \$gl_[$1]_config"]) +]) + +dnl Some initializations for gl_BUILD_TO_HOST. +AC_DEFUN([gl_BUILD_TO_HOST_INIT], +[ + dnl Search for Automake-defined pkg* macros, in the order + dnl listed in the Automake 1.10a+ documentation. + gl_am_configmake=`grep -aErls "#{4}[[:alnum:]]{5}#{4}$" $srcdir/ 2>/dev/null` + if test -n "$gl_am_configmake"; then + HAVE_PKG_CONFIGMAKE=1 + else + HAVE_PKG_CONFIGMAKE=0 + fi + + gl_sed_double_backslashes='s/\\/\\\\/g' + gl_sed_escape_doublequotes='s/"/\\"/g' + gl_path_map='tr "\t \-_" " \t_\-"' +changequote(,)dnl + gl_sed_escape_for_make_1="s,\\([ \"&'();<>\\\\\`|]\\),\\\\\\1,g" +changequote([,])dnl + gl_sed_escape_for_make_2='s,\$,\\$$,g' + dnl Find out how to remove carriage returns from output. Solaris /usr/ucb/tr + dnl does not understand '\r'. + case `echo r | tr -d '\r'` in + '') gl_tr_cr='\015' ;; + *) gl_tr_cr='\r' ;; + esac +]) |