[FFmpeg-devel] [PATCH] configure: make makeinfo_html check more robust

[Andreas Cadhalpun]

The current check is too strict for newer makeinfo versions.
Existing version strings are:
makeinfo (GNU texinfo) 4.13
makeinfo (GNU texinfo) 5.2
texi2any (GNU texinfo) 5.9.93

Probably version 6 will come in the not too far future.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
---
 configure | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 0c907ff..c692e7b 100755
--- a/configure
+++ b/configure
@@ -5239,8 +5239,8 @@ disabled securetransport || { check_func SecIdentityCreate "-Wl,-framework,CoreF
     enable securetransport; }
 
 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
-enabled makeinfo && (makeinfo --version | \
-                     grep -q 'makeinfo (GNU texinfo) 5' > /dev/null 2>&1) \
+enabled makeinfo \
+    && [ 0$(makeinfo --version | grep "texinfo" | sed 's/.*texinfo[^0-9]*\([0-9]*\)\..*/\1/') -ge 5 ] \
     && enable makeinfo_html || disable makeinfo_html
 disabled makeinfo_html && texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
-- 
2.1.4