From a2713d85eab58eff28da416942e0b0c73edd4fcb Mon Sep 17 00:00:00 2001
From: Mike Taves <mwtoews@gmail.com>
Date: Sat, 28 Aug 2021 22:06:41 +1200
Subject: proj.pc.in: add -lm -ldl in Libs.private (#2825)

---
 cmake/ProjConfig.cmake    |  1 +
 cmake/ProjUtilities.cmake | 10 ++++++++++
 2 files changed, 11 insertions(+)

(limited to 'cmake')

diff --git a/cmake/ProjConfig.cmake b/cmake/ProjConfig.cmake
index d43a2767..a53c3af1 100644
--- a/cmake/ProjConfig.cmake
+++ b/cmake/ProjConfig.cmake
@@ -15,6 +15,7 @@ check_function_exists(localeconv HAVE_LOCALECONV)
 check_function_exists(strerror HAVE_STRERROR)
 if(NOT WIN32)
     check_library_exists(dl dladdr "" HAVE_LIBDL)
+    check_library_exists(m exp "" HAVE_LIBM)
 endif()
 
 set(PACKAGE "proj")
diff --git a/cmake/ProjUtilities.cmake b/cmake/ProjUtilities.cmake
index f8688cd6..55d53cbb 100644
--- a/cmake/ProjUtilities.cmake
+++ b/cmake/ProjUtilities.cmake
@@ -83,6 +83,16 @@ function(configure_proj_pc)
   if(CURL_ENABLED)
     set(CURL_LIBS -lcurl)
   endif()
+  set(EXTRA_LIBS "-lstdc++")
+  if(HAVE_LIBM)
+    list(APPEND EXTRA_LIBS "-lm")
+  endif()
+  if(HAVE_LIBDL)
+    list(APPEND EXTRA_LIBS "-ldl")
+  endif()
+  # Join list with a space
+  string(REPLACE ";" " " _tmp_str "${EXTRA_LIBS}")
+  set(EXTRA_LIBS "${_tmp_str}")
 
   configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/proj.pc.in
-- 
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