In private header files, __BEGIN_DECLS and __END_DECLS are pointless.

Because these work slightly differently on different systems,
they are becoming a maintenance burden in the portable version,
so delete them.

Besides, one of the chief design goals of the mandoc toolbox is to
make sure that nothing related to documentation requires C++.
Consequently, linking mandoc against any kind of C++ program would
defeat the purpose and is not supported.
I don't understand why kristaps@ added them in the first place.

1 files changed, 4 insertions, 15 deletions

diff --git a/configure b/configure
index 54ebfca1..cae2f5c9 100755
--- a/configure
+++ b/configure
@@ -276,6 +276,10 @@ fi
 exec > config.h
 
 cat << __HEREDOC__
+#ifdef __cplusplus
+#error "Do not use C++.  See the INSTALL file."
+#endif
+
 #ifndef MANDOC_CONFIG_H
 #define MANDOC_CONFIG_H
 
@@ -331,21 +335,6 @@ cat << __HEREDOC__
 #define BINM_SOELIM "${BINM_SOELIM}"
 #define BINM_WHATIS "${BINM_WHATIS}"
 
-#if !defined(__BEGIN_DECLS)
-#  ifdef __cplusplus
-#  define	__BEGIN_DECLS		extern "C" {
-#  else
-#  define	__BEGIN_DECLS
-#  endif
-#endif
-#if !defined(__END_DECLS)
-#  ifdef __cplusplus
-#  define	__END_DECLS		}
-#  else
-#  define	__END_DECLS
-#  endif
-#endif
-
 __HEREDOC__
 
 if [ ${HAVE_ERR} -eq 0 ]; then