add void for function declaration parameter in configure script

Author: Tomoaki Nishiyama

RPostgreSQL/ChangeLog

@@ -1,3 +1,6 @@
+2024-01-11  Tomoaki NISHIYAMA  <tomoakin@staff.kanazawa-u.ac.jp>
+        * Supply (void) for a testprogram in configure.ac for warning by clang
+
 2024-01-10  Tomoaki NISHIYAMA  <tomoakin@staff.kanazawa-u.ac.jp>
         * Fix partial match warning #132
         * Suppress warnings on win-devel

RPostgreSQL/DESCRIPTION

@@ -1,6 +1,6 @@
 Package: RPostgreSQL
 Version: 0.7-6
-Date: 2024-01-10
+Date: 2024-01-11
 Title: R Interface to the 'PostgreSQL' Database System
 Author: Joe Conway, Dirk Eddelbuettel, Tomoaki Nishiyama, Sameer Kumar Prayaga (during 2008), Neil Tiffin
 Maintainer: Tomoaki Nishiyama <tomoakin@staff.kanazawa-u.ac.jp>

RPostgreSQL/configure

@@ -1992,7 +1992,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
  echo '#include <libpq-fe.h>' > conftest.c
- echo 'int main(void);int main(){printf("%i...",PQlibVersion());return 0;}' >> conftest.c
+ echo 'int main(void);int main(void){printf("%i...",PQlibVersion());return 0;}' >> conftest.c
 echo $CC $CFLAGS -I${PG_INCDIR} -L${PG_LIBDIR} conftest.c -lpq -o pqconftest
 $CC $CFLAGS -I${PG_INCDIR} -L${PG_LIBDIR} conftest.c -lpq -o pqconftest
 echo ./pqconftest

RPostgreSQL/configure.ac

@@ -130,7 +130,7 @@ clean:
 
 AC_LANG(C)
  echo '#include <libpq-fe.h>' > conftest.c
- echo 'int main(void);int main(){printf("%i...",PQlibVersion());return 0;}' >> conftest.c
+ echo 'int main(void);int main(void){printf("%i...",PQlibVersion());return 0;}' >> conftest.c
 echo $CC $CFLAGS -I${PG_INCDIR} -L${PG_LIBDIR} conftest.c -lpq -o pqconftest
 $CC $CFLAGS -I${PG_INCDIR} -L${PG_LIBDIR} conftest.c -lpq -o pqconftest
 echo ./pqconftest

RPostgreSQL/inst/NEWS

@@ -1,5 +1,5 @@
 Version 0.7-6
-    o   Fix bug found by warnings and suppress other nonsesical warnings
+    o   Fix bugs found by warnings and suppress other nonsesical warnings
     o   Fix partial match warning #132
     o   exclude dropped column from column listing #130