From: Ken Dreyer <kdreyer@redhat.com>
Date: Tue, 13 Sep 2022 17:34:35 +0000 (-0400)
Subject: cmake: set empty CMAKE_DL_LIBS on MinGW
X-Git-Tag: v18.1.0~1096^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=3eea1e1750fe163790416ca3f186def2087a1035;p=ceph.git

cmake: set empty CMAKE_DL_LIBS on MinGW

Upstream CMake sets CMAKE_DL_LIBS to an empty value on MINGW, but the
Fedora and RHEL packages override this and set "dl". Re-set it back to
an empty value.

We can revert this if https://bugzilla.redhat.com/2127529 is resolved
for CMake in Fedora and RHEL.

Signed-off-by: Ken Dreyer <kdreyer@redhat.com>
---

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 549b18bcfdf..8d6add4666b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -249,6 +249,12 @@ if(COMPILER_SUPPORTS_DIAGNOSTICS_COLOR)
     "$<$<COMPILE_LANGUAGE:CXX>:-fdiagnostics-color=${DIAGNOSTICS_COLOR}>")
 endif()
 
+if(MINGW)
+  # Fedora and RHEL set CMAKE_DL_LIBS on MINGW, which we must un-set here.
+  # Details at https://bugzilla.redhat.com/show_bug.cgi?id=2127529
+  set(CMAKE_DL_LIBS "")
+endif()
+
 set(EXTRALIBS ${CMAKE_DL_LIBS})
 if(HAVE_POSIX_TIMERS)
   list(APPEND EXTRALIBS ${RT_LIBRARY})