curl: Avoid checking 'send' and 'recv' signatures

cURL detects the `send` and `recv` signatures using a large loop
of `try_compile` checks.  The results are used for the following:

* Casting argument types in calls to `send` and `recv`, perhaps
  to avoid conversion warnings.  We compile with `-w` anyway.

* Providing debug variants for `CURLDEBUG`, which we do not use.

Replace the detection loops with hard-coded results that should work
well enough everywhere.  This significantly reduces the number of
configure-time checks for building CMake on some platforms.

1 files changed, 17 insertions, 0 deletions

diff --git a/Utilities/cmcurl/CMake/OtherTests.cmake b/Utilities/cmcurl/CMake/OtherTests.cmake
index 8b15029..30315dc 100644
--- a/Utilities/cmcurl/CMake/OtherTests.cmake
+++ b/Utilities/cmcurl/CMake/OtherTests.cmake
@@ -26,6 +26,13 @@ endif()
 
 set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
 
+if(1) # CMake hard-codes these
+  set(RECV_TYPE_ARG1 "curl_socket_t")
+  set(RECV_TYPE_ARG2 "char *")
+  set(RECV_TYPE_ARG3 "size_t")
+  set(RECV_TYPE_ARG4 "int")
+  set(RECV_TYPE_RETV "ssize_t")
+else()
 check_c_source_compiles("${_source_epilogue}
 int main(void) {
     recv(0, 0, 0, 0);
@@ -88,8 +95,17 @@ else()
   message(FATAL_ERROR "Unable to link function recv")
 endif()
 set(curl_cv_func_recv_args "${curl_cv_func_recv_args}" CACHE INTERNAL "Arguments for recv")
+endif()
 set(HAVE_RECV 1)
 
+if(1) # CMake hard-codes these
+  set(SEND_QUAL_ARG2 " ")
+  set(SEND_TYPE_ARG1 "curl_socket_t")
+  set(SEND_TYPE_ARG2 "char *")
+  set(SEND_TYPE_ARG3 "size_t")
+  set(SEND_TYPE_ARG4 "int")
+  set(SEND_TYPE_RETV "ssize_t")
+else()
 check_c_source_compiles("${_source_epilogue}
 int main(void) {
     send(0, 0, 0, 0);
@@ -156,6 +172,7 @@ else()
   message(FATAL_ERROR "Unable to link function send")
 endif()
 set(curl_cv_func_send_args "${curl_cv_func_send_args}" CACHE INTERNAL "Arguments for send")
+endif()
 set(HAVE_SEND 1)
 
 check_c_source_compiles("${_source_epilogue}