asco: fix build on Sequoia (#29241)

science/asco/Portfile

@@ -4,7 +4,7 @@ PortSystem          1.0
 
 name                asco
 version             0.4.11
-revision            0
+revision            1
 
 categories          science math
 platforms           darwin
@@ -30,6 +30,10 @@ depends_build       port:automake \
 
 patchfiles          implicit.patch
 
+post-patch {
+    reinplace "s|main|int main|g" ${worksrcpath}/examples/rosen/bin/de36.c
+}
+
 pre-configure {
     system -W "${worksrcpath}" "tar xzf Autotools.tar.gz"
 }