Add EXIV2_ENABLE_INIH flag to enable building without libinih.

CMakeLists.txt

@@ -31,6 +31,7 @@ option( EXIV2_ENABLE_CURL             "Use libcurl for HttpIo (WEBREADY)"
 option( EXIV2_ENABLE_BMFF             "Build with BMFF support"                               ON  )
 option( EXIV2_ENABLE_BROTLI           "Use Brotli for JPEG XL compressed boxes (BMFF)"        ON  )
 option( EXIV2_ENABLE_VIDEO            "Build with video support"                              OFF )
+option( EXIV2_ENABLE_INIH             "Use inih library"                                      ON  )
 
 option( EXIV2_BUILD_SAMPLES           "Build sample applications"                             OFF )
 option( EXIV2_BUILD_EXIV2_COMMAND     "Build exiv2 command-line executable"                   ON  )

cmake/config.h.cmake

@@ -21,6 +21,9 @@
 // Define if you want BMFF support.
 #cmakedefine EXV_ENABLE_BMFF
 
+// Define if you want to use the inih library.
+#cmakedefine EXV_ENABLE_INIH
+
 // Define if you have the strerror_r function.
 #cmakedefine EXV_HAVE_STRERROR_R
 

cmake/findDependencies.cmake

@@ -76,11 +76,13 @@ if( ICONV_FOUND )
     message ( "-- Iconv_LIBRARIES : " ${Iconv_LIBRARIES} )
 endif()
 
-find_package(inih)
-message ( "-- inih_INCLUDE_DIRS : " ${inih_INCLUDE_DIRS} )
-message ( "-- inih_LIBRARIES : " ${inih_LIBRARIES} )
-message ( "-- inih_inireader_INCLUDE_DIRS : " ${inih_inireader_INCLUDE_DIRS} )
-message ( "-- inih_inireader_LIBRARIES : " ${inih_inireader_LIBRARIES} )
+if( EXIV2_ENABLE_INIH )
+  find_package(inih)
+  message ( "-- inih_INCLUDE_DIRS : " ${inih_INCLUDE_DIRS} )
+  message ( "-- inih_LIBRARIES : " ${inih_LIBRARIES} )
+  message ( "-- inih_inireader_INCLUDE_DIRS : " ${inih_inireader_INCLUDE_DIRS} )
+  message ( "-- inih_inireader_LIBRARIES : " ${inih_inireader_LIBRARIES} )
+endif()
 
 if( BUILD_WITH_CCACHE )
     find_program(CCACHE_FOUND ccache)

cmake/generateConfigFile.cmake

@@ -9,6 +9,7 @@ endif()
 set(EXV_ENABLE_BMFF      ${EXIV2_ENABLE_BMFF})
 set(EXV_ENABLE_WEBREADY  ${EXIV2_ENABLE_WEBREADY})
 set(EXV_HAVE_LENSDATA    ${EXIV2_ENABLE_LENSDATA})
+set(EXV_ENABLE_INIH      ${EXIV2_ENABLE_INIH})
 
 set(EXV_PACKAGE_NAME     ${PROJECT_NAME})
 set(EXV_PACKAGE_VERSION  ${PROJECT_VERSION})

samples/CMakeLists.txt

@@ -72,8 +72,10 @@ target_include_directories(path-test PRIVATE
 
 install( TARGETS metacopy RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 
-target_link_libraries( ini-test PRIVATE inih::libinih )
-target_link_libraries( ini-test PRIVATE inih::inireader )
+if( EXIV2_ENABLE_INIH )
+  target_link_libraries( ini-test PRIVATE inih::libinih )
+  target_link_libraries( ini-test PRIVATE inih::inireader )
+endif()
 
 if( EXPAT_FOUND )
     add_executable(        geotag    geotag.cpp)

src/CMakeLists.txt

@@ -260,10 +260,12 @@ if( ICONV_FOUND )
     target_link_libraries( exiv2lib PRIVATE Iconv::Iconv )
 endif()
 
-target_link_libraries( exiv2lib_int PRIVATE inih::libinih )
-target_link_libraries( exiv2lib_int PRIVATE inih::inireader )
-target_link_libraries( exiv2lib PRIVATE inih::libinih )
-target_link_libraries( exiv2lib PRIVATE inih::inireader )
+if( EXIV2_ENABLE_INIH )
+  target_link_libraries( exiv2lib_int PRIVATE inih::libinih )
+  target_link_libraries( exiv2lib_int PRIVATE inih::inireader )
+  target_link_libraries( exiv2lib PRIVATE inih::libinih )
+  target_link_libraries( exiv2lib PRIVATE inih::inireader )
+endif()
 
 write_basic_package_version_file(exiv2ConfigVersion.cmake COMPATIBILITY ExactVersion)
 

src/makernote_int.cpp

@@ -15,7 +15,9 @@
 #include "utils.hpp"
 
 // + standard includes
+#ifdef EXV_ENABLE_INIH
 #include <INIReader.h>
+#endif
 #include <array>
 #include <filesystem>
 #include <iostream>
@@ -81,10 +83,12 @@ std::string getExiv2ConfigPath() {
 std::string readExiv2Config(const std::string& section, const std::string& value, const std::string& def) {
   std::string result = def;
 
+#ifdef EXV_ENABLE_INIH
   INIReader reader(Exiv2::Internal::getExiv2ConfigPath());
   if (reader.ParseError() == 0) {
     result = reader.Get(section, value, def);
   }
+#endif
 
   return result;
 }

unitTests/CMakeLists.txt

@@ -48,10 +48,12 @@ target_link_libraries(unit_tests
         GTest::gtest
         GTest::gtest_main
         std::filesystem
-        inih::libinih
-        inih::inireader
 )
 
+if( EXIV2_ENABLE_INIH )
+  target_link_libraries(unit_tests PRIVATE inih::libinih inih::inireader)
+endif()
+
 # ZLIB is used in exiv2lib_int.
 if( EXIV2_ENABLE_PNG )
     target_link_libraries(unit_tests PRIVATE ${ZLIB_LIBRARIES} )