From: Alexei Sheplyakov <Alexei.Sheplyakov@gmail.com>
Date: Wed, 25 May 2011 09:18:27 +0000 (+0300)
Subject: configure: correctly warn about missing flex and/or bison.
X-Git-Tag: release_1-6-1~6
X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=commitdiff_plain;h=01d804753f9f140b2e470e10ff2b97ddae1627dd;p=ginac.git

configure: correctly warn about missing flex and/or bison.

This version correctly handles out of source builds, does not break
cross compilation, and contains no bashisms.
---

diff --git a/configure.ac b/configure.ac
index 3ad966e4..ea664ee1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,6 +115,10 @@ AC_PATH_PROG(DVIPS, dvips, "")
 AM_CONDITIONAL(CONFIG_TEX, [test ! \( -z "$LATEX" -o -z $"PDFLATEX" -o -z "$MAKEINDEX" -o -z "$DVIPS" \)])
 AC_PATH_PROG(FIG2DEV, fig2dev, "")
 AM_CONDITIONAL(CONFIG_FIG2DEV, [test ! -z "$FIG2DEV"])
+AS_IF([test "x$LEX" = "x:" -a ! -f $srcdir/ginsh/ginsh_lexer.cc],
+      [GINAC_WARNING([ginsh will not compile, because lex/flex is missing])])
+AS_IF([test -z "$YACCEXE" -a ! -f $srcdir/ginsh/ginsh_parser.h],
+      [GINAC_WARNING([ginsh will not compile, because yacc/bison is missing])])
 AS_IF([test -z "$FIG2DEV" -o -z "$MAKEINFO"],
 	  [GINAC_WARNING([Documentation may not build, because fig2dev/texinfo is missing.])])
 AS_IF([test -z "$DOXYGEN"],