--- a/JPEG/jpeg/configure 2013-11-15 18:50:03.000000000 -0500 +++ b/JPEG/jpeg/configure 2023-09-05 23:36:12.675151164 -0400 @@ -623,7 +623,7 @@ cat > conftest.$ac_ext <<EOF #line 625 "configure" #include "confdefs.h" -main(){return(0);} +int main(){return(0);} EOF if { (eval echo configure:629: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then ac_cv_prog_cc_works=yes