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17 lines
510 B
Plaintext
17 lines
510 B
Plaintext
# serial 1 -*- Autoconf -*-
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# BISON_AC_PROG_GNU_M4
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# --------------------
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# Check for GNU m4, at least 1.3 (supports frozen files).
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AC_DEFUN([BISON_AC_PROG_GNU_M4],
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[AC_PATH_PROGS(M4, gm4 gnum4 m4, m4)
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AC_CACHE_CHECK([whether m4 supports frozen files],
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[ac_cv_prog_gnu_m4],
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[ac_cv_prog_gnu_m4=no
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if test x"$M4" != x; then
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case `$M4 --help < /dev/null 2>&1` in
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*reload-state*) ac_cv_prog_gnu_m4=yes ;;
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esac
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fi])
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])# BISON_AC_PROG_GNU_M4
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