cmake: make runtests targets build the curl tool

To allow running tests just by building the `test-full` (or similar) in
a single step.

Closes #17967

CMakeLists.txt

@@ -175,6 +175,7 @@ else()
 endif()
 
 set(LIB_NAME "libcurl")
+set(EXE_NAME "curl")
 
 set_property(DIRECTORY APPEND PROPERTY INCLUDE_DIRECTORIES "${PROJECT_SOURCE_DIR}/include")
 

src/CMakeLists.txt

@@ -21,7 +21,7 @@
 # SPDX-License-Identifier: curl
 #
 ###########################################################################
-set(EXE_NAME curl)
+
 set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS "${CURL_DEBUG_MACROS}")
 
 set(_curl_cfiles_gen "")

tests/CMakeLists.txt

@@ -57,7 +57,10 @@ function(curl_add_runtests _targetname _test_flags)
   # This avoids: GNU Make doing a slow re-evaluation of all targets and
   # skipping them, MSBuild doing a re-evaluation, and actually rebuilding them.
   if(NOT _targetname STREQUAL "test-ci")
-    set(_depends "testdeps")
+    if(BUILD_CURL_EXE)
+      list(APPEND _depends ${EXE_NAME})
+    endif()
+    list(APPEND _depends "testdeps")
   endif()
   # Use a special '$TFLAGS' placeholder as last argument which will be
   # replaced by the contents of the environment variable in runtests.pl.
@@ -78,7 +81,10 @@ endfunction()
 function(curl_add_pytests _targetname _test_flags)
   set(_depends "")
   if(NOT _targetname STREQUAL "pytest-ci")
-    set(_depends "clients")
+    if(BUILD_CURL_EXE)
+      list(APPEND _depends ${EXE_NAME})
+    endif()
+    list(APPEND _depends "clients")
   endif()
   string(REPLACE " " ";" _test_flags_list "${_test_flags}")
   add_custom_target(${_targetname}