From 67f73084ca824e6c2465c47a5b67b16b5beca569 Mon Sep 17 00:00:00 2001
From: Roger Leigh <rleigh@codelibre.net>
Date: Thu, 14 Dec 2023 18:30:31 +0000
Subject: [PATCH] cmake: Replace CMath::CMath with direct link to avoid export
 of target

Link with CMATH_LIBRARIES instead of CMath::CMath.  While this
will still be exported, it will be available on the host system.
---
 cmake/FindCMath.cmake            | 12 +++---------
 contrib/dbs/CMakeLists.txt       | 10 ++++++++--
 libtiff/CMakeLists.txt           |  6 +++---
 tools/unsupported/CMakeLists.txt |  5 ++++-
 4 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/cmake/FindCMath.cmake b/cmake/FindCMath.cmake
index ad922180b..c4833af7e 100644
--- a/cmake/FindCMath.cmake
+++ b/cmake/FindCMath.cmake
@@ -55,18 +55,12 @@ if(CMath_FOUND)
         set(CMath_INCLUDE_DIRS)
     endif()
     if(NOT CMath_LIBRARIES)
+        if(NOT CMath_LIBRARY)
+          unset(CMath_LIBRARY)
+        endif()
         if (CMath_LIBRARY)
             set(CMath_LIBRARIES ${CMath_LIBRARY})
         endif()
     endif()
 
-    if(NOT TARGET CMath::CMath)
-        if(CMath_LIBRARIES)
-            add_library(CMath::CMath UNKNOWN IMPORTED)
-            set_target_properties(CMath::CMath PROPERTIES
-                  IMPORTED_LOCATION "${CMath_LIBRARY}")
-        else()
-            add_library(CMath::CMath INTERFACE IMPORTED)
-        endif()
-    endif()
 endif()
diff --git a/contrib/dbs/CMakeLists.txt b/contrib/dbs/CMakeLists.txt
index 74b2a02a0..18b7ea8b4 100644
--- a/contrib/dbs/CMakeLists.txt
+++ b/contrib/dbs/CMakeLists.txt
@@ -26,13 +26,19 @@ add_executable(tiff-bi tiff-bi.c)
 target_link_libraries(tiff-bi tiff tiff_port)
 
 add_executable(tiff-grayscale tiff-grayscale.c)
-target_link_libraries(tiff-grayscale tiff tiff_port CMath::CMath)
+target_link_libraries(tiff-grayscale PRIVATE tiff tiff_port)
+if(CMath_LIBRARIES)
+  target_link_libraries(tiff-grayscale PRIVATE ${CMath_LIBRARIES})
+endif()
 
 add_executable(tiff-palette tiff-palette.c)
 target_link_libraries(tiff-palette tiff tiff_port)
 
 add_executable(tiff-rgb tiff-rgb.c)
-target_link_libraries(tiff-rgb tiff tiff_port CMath::CMath)
+target_link_libraries(tiff-rgb PRIVATE tiff tiff_port)
+if(CMath_LIBRARIES)
+  target_link_libraries(tiff-rgb PRIVATE ${CMath_LIBRARIES})
+endif()
 
 if(WEBP_SUPPORT AND EMSCRIPTEN)
   # Emscripten is pretty finnicky about linker flags.
diff --git a/libtiff/CMakeLists.txt b/libtiff/CMakeLists.txt
index a8aa0c320..a65f3c230 100755
--- a/libtiff/CMakeLists.txt
+++ b/libtiff/CMakeLists.txt
@@ -184,9 +184,9 @@ if(WEBP_SUPPORT)
   target_link_libraries(tiff PRIVATE WebP::webp)
   string(APPEND tiff_requires_private " libwebp")
 endif()
-if(CMath_LIBRARY)
-  target_link_libraries(tiff PRIVATE CMath::CMath)
-  list(APPEND tiff_libs_private_list "${CMath_LIBRARY}")
+if(CMath_LIBRARIES)
+  target_link_libraries(tiff PRIVATE ${CMath_LIBRARIES})
+  list(APPEND tiff_libs_private_list "${CMath_LIBRARIES}")
 endif()
 
 set(tiff_libs_private_list "${tiff_libs_private_list}" PARENT_SCOPE)
-- 
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