Work around gcc warnings from curl headers

After master.k.org upgrade, I started seeing these warning messages:

    transport.c: In function 'get_refs_via_curl':
    transport.c:458: error: call to '_curl_easy_setopt_err_write_callback' declared with attribute warning: curl_easy_setopt expects a curl_write_callback argument for this option

It appears that the curl header wants to enforce the function signature
for callback function given to curl_easy_setopt() to be compatible with
that of (*curl_write_callback) or fwrite.  This patch seems to work the
issue around.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/http.c b/http.c
index 105dc93843ba1f01ea0d40c63dd174e879f1a25a..ad146404129b8522269605076e8391542a3241f5 100644 (file)
--- a/http.c
+++ b/http.c
@@ -30,10 +30,11 @@ static struct curl_slist *pragma_header;
 
 static struct active_request_slot *active_queue_head = NULL;
 
-size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb,
-                          struct buffer *buffer)
+size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 {
        size_t size = eltsize * nmemb;
+       struct buffer *buffer = buffer_;
+
        if (size > buffer->buf.len - buffer->posn)
                size = buffer->buf.len - buffer->posn;
        memcpy(ptr, buffer->buf.buf + buffer->posn, size);
@@ -42,17 +43,17 @@ size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb,
        return size;
 }
 
-size_t fwrite_buffer(const void *ptr, size_t eltsize,
-                           size_t nmemb, struct strbuf *buffer)
+size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 {
        size_t size = eltsize * nmemb;
+       struct strbuf *buffer = buffer_;
+
        strbuf_add(buffer, ptr, size);
        data_received++;
        return size;
 }
 
-size_t fwrite_null(const void *ptr, size_t eltsize,
-                         size_t nmemb, struct strbuf *buffer)
+size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 {
        data_received++;
        return eltsize * nmemb;

diff --git a/http.h b/http.h
index a04fc6a9277945a7084e718753c133ed47d13691..905b4629a47789705c13745fd56ce0c91adea41b 100644 (file)
--- a/http.h
+++ b/http.h
@@ -64,12 +64,9 @@ struct buffer
 };
 
 /* Curl request read/write callbacks */
-extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb,
-                          struct buffer *buffer);
-extern size_t fwrite_buffer(const void *ptr, size_t eltsize,
-                           size_t nmemb, struct strbuf *buffer);
-extern size_t fwrite_null(const void *ptr, size_t eltsize,
-                         size_t nmemb, struct strbuf *buffer);
+extern size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
+extern size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
+extern size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf);
 
 /* Slot lifecycle functions */
 extern struct active_request_slot *get_active_slot(void);