Remove __cplusplus preamble from internal headers

These headers are internal and never exposed to a cpp compiler, hence no
need for the preamble.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/6554)

6 files changed, 0 insertions, 43 deletions

diff --git a/include/internal/conf.h b/include/internal/conf.h
index ada3f92b4d..23a9c3b474 100644
--- a/include/internal/conf.h
+++ b/include/internal/conf.h
@@ -12,11 +12,6 @@
 
 #include <openssl/conf.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
 struct ossl_init_settings_st {
     char *appname;
 };
@@ -25,8 +20,4 @@ void openssl_config_int(const char *appname);
 void openssl_no_config_int(void);
 void conf_modules_free_int(void);
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif
diff --git a/include/internal/constant_time_locl.h b/include/internal/constant_time_locl.h
index d23f515c4f..82ff74652e 100644
--- a/include/internal/constant_time_locl.h
+++ b/include/internal/constant_time_locl.h
@@ -14,10 +14,6 @@
 # include <string.h>
 # include <openssl/e_os2.h>              /* For 'ossl_inline' */
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /*-
  * The boolean methods return a bitmask of all ones (0xff...f) for true
  * and 0 for false. This is useful for choosing a value based on the result
@@ -328,8 +324,4 @@ static ossl_inline void constant_time_lookup(void *out,
     }
 }
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif                          /* HEADER_CONSTANT_TIME_LOCL_H */
diff --git a/include/internal/cryptlib.h b/include/internal/cryptlib.h
index 8a96de9847..2808fe7eea 100644
--- a/include/internal/cryptlib.h
+++ b/include/internal/cryptlib.h
@@ -25,10 +25,6 @@
 # include <openssl/err.h>
 # include "internal/nelem.h"
 
-#ifdef  __cplusplus
-extern "C" {
-#endif
-
 #ifdef NDEBUG
 # define ossl_assert(x) ((x) != 0)
 #else
@@ -96,8 +92,4 @@ void *openssl_fopen(const char *filename, const char *mode);
 
 uint32_t OPENSSL_rdtsc(void);
 
-#ifdef  __cplusplus
-}
-#endif
-
 #endif
diff --git a/include/internal/dso.h b/include/internal/dso.h
index 402a76f6df..3e67d5053a 100644
--- a/include/internal/dso.h
+++ b/include/internal/dso.h
@@ -13,10 +13,6 @@
 # include <openssl/crypto.h>
 # include "internal/dsoerr.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* These values are used as commands to DSO_ctrl() */
 # define DSO_CTRL_GET_FLAGS      1
 # define DSO_CTRL_SET_FLAGS      2
@@ -166,7 +162,4 @@ void *DSO_global_lookup(const char *name);
 
 int ERR_load_DSO_strings(void);
 
-# ifdef  __cplusplus
-}
-# endif
 #endif
diff --git a/include/internal/dsoerr.h b/include/internal/dsoerr.h
index a54a18545e..ac6bdcd038 100644
--- a/include/internal/dsoerr.h
+++ b/include/internal/dsoerr.h
@@ -15,9 +15,6 @@
 
 # ifndef OPENSSL_NO_DSO
 
-#  ifdef  __cplusplus
-extern "C"
-#  endif
 int ERR_load_DSO_strings(void);
 
 /*
diff --git a/include/internal/o_dir.h b/include/internal/o_dir.h
index f18fc6708e..f8926877d8 100644
--- a/include/internal/o_dir.h
+++ b/include/internal/o_dir.h
@@ -39,10 +39,6 @@
 #ifndef O_DIR_H
 # define O_DIR_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 typedef struct OPENSSL_dir_context_st OPENSSL_DIR_CTX;
 
 /*
@@ -53,8 +49,4 @@ const char *OPENSSL_DIR_read(OPENSSL_DIR_CTX **ctx, const char *directory);
 /* returns 1 on success, 0 on error */
 int OPENSSL_DIR_end(OPENSSL_DIR_CTX **ctx);
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif                          /* LPDIR_H */