From a91fc6c16ea54a46200871218b3c3f083fc84ca6 Mon Sep 17 00:00:00 2001
From: gama <misept.dieseneuf@gmail.com>
Date: Tue, 10 Mar 2026 17:17:30 +0300
Subject: [PATCH 1/2] [CMAKE] Make the install command optional to prevent an
 error during configuration time

---
 CMakeLists.txt | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7e2f480..88aa161 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -296,11 +296,15 @@ install( TARGETS ${INSTALL_TARGETS}
 )
 install( FILES  ${INSTALL_HEADERS}  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/pffft)
 
-install(EXPORT pffft-targets
-  FILE pffft-targets.cmake
-  NAMESPACE PFFFT::
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
-)
+if (INSTALL_PFFFT)
+  # If ${INSTALL_TARGETS} is empty, then the export "pffft-targets" will
+  # not exist and the following command will fail so we must make it conditional
+  install(EXPORT pffft-targets
+    FILE pffft-targets.cmake
+    NAMESPACE PFFFT::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
+  )
+endif()
 
 include(CMakePackageConfigHelpers)
 

From 0d815eb48d598e4b1772ee17aae81be689a33f65 Mon Sep 17 00:00:00 2001
From: gama <misept.dieseneuf@gmail.com>
Date: Tue, 10 Mar 2026 19:14:13 +0300
Subject: [PATCH 2/2] [CMAKE] Conditional on actual variable emptiness + add
 more install cruft into the conditional scope

---
 CMakeLists.txt | 48 ++++++++++++++++++++++++------------------------
 1 file changed, 24 insertions(+), 24 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 88aa161..7613b18 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -289,14 +289,14 @@ endif()
 
 ######################################################
 
-install( TARGETS ${INSTALL_TARGETS}
-  EXPORT pffft-targets
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-)
-install( FILES  ${INSTALL_HEADERS}  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/pffft)
+if (INSTALL_TARGETS)
+  install( TARGETS ${INSTALL_TARGETS}
+    EXPORT pffft-targets
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  )
+  install( FILES  ${INSTALL_HEADERS}  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/pffft)
 
-if (INSTALL_PFFFT)
   # If ${INSTALL_TARGETS} is empty, then the export "pffft-targets" will
   # not exist and the following command will fail so we must make it conditional
   install(EXPORT pffft-targets
@@ -304,27 +304,27 @@ if (INSTALL_PFFFT)
     NAMESPACE PFFFT::
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
   )
-endif()
 
-include(CMakePackageConfigHelpers)
+  include(CMakePackageConfigHelpers)
 
-configure_package_config_file(
-  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pffft-config.cmake.in"
-  "${CMAKE_CURRENT_BINARY_DIR}/pffft-config.cmake"
-  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
-)
+  configure_package_config_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pffft-config.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/pffft-config.cmake"
+    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
+  )
 
-write_basic_package_version_file(
-  "${CMAKE_CURRENT_BINARY_DIR}/pffft-config-version.cmake"
-  VERSION 1.0
-  COMPATIBILITY SameMajorVersion
-)
+  write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/pffft-config-version.cmake"
+    VERSION 1.0
+    COMPATIBILITY SameMajorVersion
+  )
 
-install(FILES
-  "${CMAKE_CURRENT_BINARY_DIR}/pffft-config.cmake"
-  "${CMAKE_CURRENT_BINARY_DIR}/pffft-config-version.cmake"
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
-)
+  install(FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/pffft-config.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/pffft-config-version.cmake"
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pffft
+  )
+endif()
 
 add_custom_target(uninstall
     "${CMAKE_COMMAND}" -P "${CMAKE_SOURCE_DIR}/uninstall.cmake"