[groff] 04/80: m4/groff.m4: Search harder for an m4(1) program.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit e757c8e6ba51abd317192d295fe5cd7dd37e847b
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Thu Nov 21 19:57:19 2024 -0600

    m4/groff.m4: Search harder for an m4(1) program.
    
    * m4/groff.m4 (GROFF_PROG_M4): Also search for `gm4`.  Obviates need to
      specify `M4=gm4` in `configure`'s environment on Solaris 10.
---
 ChangeLog   | 6 ++++++
 m4/groff.m4 | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c7f565677..eb620971c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2024-11-21  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * m4/groff.m4 (GROFF_PROG_M4): Also search for `gm4`.  Obviates
+       need to specify `M4=gm4` in `configure`'s environment on Solaris
+       10.
+
 2024-11-21  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        * m4/groff.m4 (GROFF_DIFF_D): Report name of detected diff(1)
diff --git a/m4/groff.m4 b/m4/groff.m4
index ad19b702f..1eaeeeac9 100644
--- a/m4/groff.m4
+++ b/m4/groff.m4
@@ -130,10 +130,10 @@ AC_DEFUN([GROFF_PERL], [
 # We need m4 to generate some man pages.
 
 AC_DEFUN([GROFF_PROG_M4], [
-  AC_CHECK_PROGS([M4], [m4], [missing])
+  AC_CHECK_PROGS([M4], [m4 gm4], [missing])
   if test "$M4" = missing
   then
-    AC_MSG_ERROR([could not find 'm4'], 1)
+    AC_MSG_ERROR([could not find an m4 program], 1)
   fi
 ])