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Diffstat (limited to 'm4/fptools_happy.m4')
| -rw-r--r-- | m4/fptools_happy.m4 | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/m4/fptools_happy.m4 b/m4/fptools_happy.m4 new file mode 100644 index 0000000000..d77621eaf7 --- /dev/null +++ b/m4/fptools_happy.m4 @@ -0,0 +1,34 @@ +dnl +dnl Check for Happy and version: +dnl +dnl 1. Use happy specified in env var HAPPY +dnl 2. Find happy in path +dnl 3. Check happy version +dnl +dnl If you increase the minimum version requirement, please also update: +dnl https://gitlab.haskell.org/ghc/ghc/wikis/building/preparation/tools +dnl +AC_DEFUN([FPTOOLS_HAPPY], +[AC_PATH_PROG(HAPPY,[happy],) +AC_SUBST(HappyCmd,$HAPPY) +AC_CACHE_CHECK([for version of happy], fptools_cv_happy_version, +changequote(, )dnl +[ +if test x"$HappyCmd" != x; then + fptools_cv_happy_version=`"$HappyCmd" -v | + grep 'Happy Version' | sed -e 's/Happy Version \([^ ]*\).*/\1/g'` ; +else + fptools_cv_happy_version=""; +fi; +changequote([, ])dnl +]) +if test ! -f compiler/GHC/Parser.hs || test ! -f compiler/GHC/Cmm/Parser.hs +then + FP_COMPARE_VERSIONS([$fptools_cv_happy_version],[-lt],[1.20.0], + [AC_MSG_ERROR([Happy version 1.20 or later is required to compile GHC.])])[] + FP_COMPARE_VERSIONS([$fptools_cv_happy_version],[-ge],[1.21.0], + [AC_MSG_ERROR([Happy version 1.20 or earlier is required to compile GHC.])])[] +fi +HappyVersion=$fptools_cv_happy_version; +AC_SUBST(HappyVersion) +]) |