m4/esidl.m4 (AC_PROG_ESIDL) : Support help2man style version string

Author: ShikiOkasaka

configure

@@ -4230,7 +4230,7 @@ fi
 if test "$ESIDL" = "no"; then
   as_fn_error $? "Cannot find esidl; esidl Web IDL compiler is needed." "$LINENO" 5
 fi
-ESIDL_VERSION=`esidl --version | cut -f 3 -d ' '`
+ESIDL_VERSION=`esidl --version | head -n 1 | grep -Eo '[0-9]+\.[0-9]+\.[0-9]+'`
 
 
 

m4/esidl.m4

@@ -3,7 +3,7 @@ AC_CHECK_PROG(ESIDL, [esidl], [esidl], [no])
 if test "$ESIDL" = "no"; then
   AC_MSG_ERROR([Cannot find esidl; esidl Web IDL compiler is needed.])
 fi
-ESIDL_VERSION=`esidl --version | cut -f 3 -d ' '`
+ESIDL_VERSION=`esidl --version | head -n 1 | grep -Eo '[[0-9]]+\.[[0-9]]+\.[[0-9]]+'`
 AX_COMPARE_VERSION([$ESIDL_VERSION], [lt], [$1],
   AC_MSG_ERROR([Cannot find esidl version $1 or later. A newer version is needed.]))
 AC_SUBST(ESIDL,[$ESIDL])