From: Azat Khuzhin <azat@libevent.org>
Date: Sat, 30 Nov 2019 12:48:36 +0000 (+0300)
Subject: cmake: set CMAKE_{RUNTIME,LIBRARY,ARCHIVE}_OUTPUT_DIRECTORY they are not defined
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8f13c170cf6e9a02dec410b967884ec5e08947ab;p=libevent

cmake: set CMAKE_{RUNTIME,LIBRARY,ARCHIVE}_OUTPUT_DIRECTORY they are not defined

This will allow overriding them in parent cmake rules, i.e. if libevent
is used via add_subdirectory().

Closes: #931
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b2537d5..1efda0e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,9 +159,18 @@ option(EVENT__COVERAGE
 
 # Put the libaries and binaries that get built into directories at the
 # top of the build tree rather than in hard-to-find leaf directories.
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
-set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
+#
+# But only if this variables are not defined yet
+# (i.e. libevent is used via add_subdirectory())
+if (NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
+endif()
+if (NOT DEFINED CMAKE_LIBRARY_OUTPUT_DIRECTORY)
+    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
+endif()
+if (NOT DEFINED CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
+    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
+endif()
 
 if (EVENT__ENABLE_VERBOSE_DEBUG)
     add_definitions(-DUSE_DEBUG=1)