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63 lines
2.4 KiB
Plaintext
63 lines
2.4 KiB
Plaintext
# Extract data from preprocessor output using sed expresions.
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# Copyright (c) 2003
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# Derek R. Price, Ximbiot <http://ximbiot.com>,
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# and the Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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# ACX_EXTRACT_CPP_DEFN(VARIABLE, PROGRAM,
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# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# -------------------------------------------
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# Extract single line definitions from preprocessor output. If the
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# output of the C preprocessor on PROGRAM contains a definition for VARIABLE,
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# assign it to shell variable VARIABLE and run ACTION-IF-FOUND. Otherwise run
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# ACTION-IF-NOT-FOUND.
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AC_DEFUN([ACX_EXTRACT_CPP_DEFN],
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[AC_LANG_PREPROC_REQUIRE()dnl
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AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])])
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dnl eval is necessary to expand ac_cpp.
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dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
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ac_extract_cpp_result=`(eval "$ac_cpp -dM conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
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dnl m4 quote the argument to sed to prevent m4 from eating character classes
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dnl
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dnl C89 6.8.3 Specifies that all whitespace separation in macro definitions is
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dnl equivalent, so eat leading and trailing whitespace to account for
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dnl preprocessor quirks (commands 1.2 & 1.3 in the sed script below).
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sed -n ["/^#define $1 /{
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s/^#define $1 //;
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s/^ *//;
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s/ *\$//;
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p;}"] 2>&AS_MESSAGE_LOG_FD`
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if test -n "$ac_extract_cpp_result"; then
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$1=$ac_extract_cpp_result
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m4_ifvaln([$3], [$3])dnl
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m4_ifvaln([$4], [else
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$4])dnl
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fi
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rm -f conftest*
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])# ACX_EXTRACT_CPP_DEFN
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# ACX_EXTRACT_HEADER_DEFN(VARIABLE, HEADER-FILE,
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# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# ---------------------------------------------------------
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AC_DEFUN([ACX_EXTRACT_HEADER_DEFN],
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[ACX_EXTRACT_CPP_DEFN([$1],
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[#include <$2>
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], [$3], [$4])])
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