Don't build DLL sources if BUILD_SHARED_LIBS=OFF.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9acf18df69bd51490c34ba8a3af55db8abbfcfe5..fc0f44935a69ad50f6448978f10bf9ac9e8a6fcd 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -920,43 +920,45 @@ set(ZLIB_GZFILE_SRCS
     gzwrite.c
 )
 
-if(NOT MINGW AND NOT MSYS AND NOT CYGWIN)
-    set(ZLIB_DLL_SRCS
-        win32/zlib${SUFFIX}1.rc # If present will override custom build rule below.
-    )
+set(ZLIB_ALL_SRCS ${ZLIB_SRCS} ${ZLIB_ARCH_HDRS} ${ZLIB_ARCH_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+if(WITH_GZFILEOP)
+    list(APPEND ZLIB_ALL_SRCS ${ZLIB_GZFILE_PRIVATE_HDRS} ${ZLIB_GZFILE_SRCS})
 endif()
 
-if(MINGW OR MSYS OR CYGWIN)
-    # This gets us DLL resource information when compiling on MinGW.
-    if(NOT CMAKE_RC_COMPILER)
-        set(CMAKE_RC_COMPILER windres.exe)
+if(NOT DEFINED BUILD_SHARED_LIBS OR BUILD_SHARED_LIBS)
+    if(NOT MINGW AND NOT MSYS AND NOT CYGWIN)
+        # If present will override custom build rule below.
+        set(ZLIB_DLL_SRCS win32/zlib${SUFFIX}1.rc)
     endif()
 
-    add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
-        COMMAND ${CMAKE_RC_COMPILER}
-            -D GCC_WINDRES
-            -I ${CMAKE_CURRENT_SOURCE_DIR}
-            -I ${CMAKE_CURRENT_BINARY_DIR}
-            -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
-            -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib${SUFFIX}1.rc)
-    set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
-endif()
+    if(MINGW OR MSYS OR CYGWIN)
+        # This gets us DLL resource information when compiling on MinGW.
+        if(NOT CMAKE_RC_COMPILER)
+            set(CMAKE_RC_COMPILER windres.exe)
+        endif()
 
-set(ZLIB_ALL_SRCS ${ZLIB_SRCS} ${ZLIB_ARCH_HDRS} ${ZLIB_ARCH_SRCS} ${ZLIB_DLL_SRCS}
-    ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
-if(WITH_GZFILEOP)
-    list(APPEND ZLIB_ALL_SRCS ${ZLIB_GZFILE_PRIVATE_HDRS} ${ZLIB_GZFILE_SRCS})
+        add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
+            COMMAND ${CMAKE_RC_COMPILER}
+                -D GCC_WINDRES
+                -I ${CMAKE_CURRENT_SOURCE_DIR}
+                -I ${CMAKE_CURRENT_BINARY_DIR}
+                -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
+                -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib${SUFFIX}1.rc)
+        set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
+    endif()
 endif()
 
 if(NOT DEFINED BUILD_SHARED_LIBS)
-    add_library(zlib SHARED ${ZLIB_ALL_SRCS})
+    add_library(zlib SHARED ${ZLIB_ALL_SRCS} ${ZLIB_DLL_SRCS})
     add_library(zlibstatic STATIC ${ZLIB_ALL_SRCS})
 
     set(ZLIB_INSTALL_LIBRARIES zlib zlibstatic)
 else()
     add_library(zlib ${ZLIB_ALL_SRCS})
 
-    if(NOT BUILD_SHARED_LIBS)
+    if(BUILD_SHARED_LIBS)
+        target_sources(zlib PRIVATE ${ZLIB_DLL_SRCS})
+    else()
         add_library(zlibstatic ALIAS zlib)
     endif()