A testdir that contains both the 'termcap' and 'terminfo' modules fails
to build on systems that don't have libncurses nor libtermcap:
gcc-10 -Wno-error -g -O2 -L/home/bruno/inst-x86_64-64/lib -o test-termcap
test-termcap.o libtests.a ../gllib/libgnu.a libtests.a ../gllib/libgnu.a
libtests.a -ltermcap
/usr/bin/ld: cannot find -ltermcap
collect2: error: ld returned 1 exit status
make[5]: *** [Makefile:1373: test-termcap] Error 1
The cause is that while running configure, gl_TERMCAP_BODY sets
LIBTERMCAP to empty, and then later gl_TERMINFO_BODY sets
LIBTERMCAP='-ltermcap'. gl_TERMINFO_BODY needs LIBTERMCAP only for
internal purposes, whereas for gl_TERMCAP_BODY it is one of the documented
output variables.
This patch fixes it.
2022-09-02 Bruno Haible <br...@clisp.org>
terminfo: Don't disturb the termcap module.
* m4/terminfo.m4 (gl_TERMINFO_BODY): Save and restore the variables
determined by the gl_TERMCAP_BODY macro.
diff --git a/m4/terminfo.m4 b/m4/terminfo.m4
index e923518540..7daa4d5513 100644
--- a/m4/terminfo.m4
+++ b/m4/terminfo.m4
@@ -1,4 +1,4 @@
-# terminfo.m4 serial 4
+# terminfo.m4 serial 5
dnl Copyright (C) 2000-2022 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -45,6 +45,11 @@ AC_DEFUN([gl_TERMINFO_BODY],
AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
AC_REQUIRE([AC_LIB_RPATH])
+ dnl Avoid disturbing the gl_TERMCAP_BODY macro.
+ gl_save_LIBTERMCAP="$LIBTERMCAP"
+ gl_save_LTLIBTERMCAP="$LTLIBTERMCAP"
+ gl_save_INCTERMCAP="$INCTERMCAP"
+
if test "$gl_curses_allowed" != no; then
dnl Search for libncurses and define LIBNCURSES, LTLIBNCURSES and
INCNCURSES
@@ -398,4 +403,9 @@ AC_DEFUN([gl_TERMINFO_BODY],
LIBS="$gl_save_LIBS"
])
fi
+
+ dnl Avoid disturbing the gl_TERMCAP_BODY macro.
+ LIBTERMCAP="$gl_save_LIBTERMCAP"
+ LTLIBTERMCAP="$gl_save_LTLIBTERMCAP"
+ INCTERMCAP="$gl_save_INCTERMCAP"
])
