exim requires a C11 compiler so use ports-gcc.
With this it compiles on sparc64.
--
:wq Claudio
Index: Makefile
===================================================================
RCS file: /cvs/ports/mail/exim/Makefile,v
diff -u -p -r1.155 Makefile
--- Makefile 26 Nov 2025 09:19:30 -0000 1.155
+++ Makefile 15 Dec 2025 13:57:00 -0000
@@ -20,6 +20,10 @@ cWANTLIB = c m
WANTLIB-main = ${cWANTLIB} crypto execinfo iconv perl pcre2-8 ssl
WANTLIB-eximon = ${cWANTLIB} X11 Xaw Xext Xmu Xt pcre2-8
+# needs C11 _Generic
+COMPILER = base-clang ports-gcc
+COMPILER_LANGS = c
+
SITES = https://ftp.exim.org/pub/exim/exim4/ \
https://ftp.exim.org/pub/exim/exim4/fixes/ \
https://ftp.exim.org/pub/exim/exim4/old/ \
