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make std::filesystem optional

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Add a switch to disable std::filesystem so it can be optinally disabled
this should let users that older compilers versions to disable it
This commit is contained in:
Jonathan Guzmán 2022-12-11 14:39:49 -06:00
parent 891e1cba5e
commit 8d36ab8304
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4 changed files with 30 additions and 0 deletions
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7
CMakeLists.txt
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@ -294,6 +294,13 @@ else (SQLITECPP_INTERNAL_SQLITE)
endif()
endif (SQLITECPP_INTERNAL_SQLITE)
## disable the optional support for std::filesystem (C++17)
option(SQLITECPP_DISABLE_STD_FILESYSTEM "Disable the use of std::filesystem in SQLiteCpp." OFF)
if (SQLITECPP_DISABLE_STD_FILESYSTEM)
message (STATUS "Disabling std::filesystem support")
add_definitions(-DSQLITECPP_DISABLE_STD_FILESYSTEM)
endif (SQLITECPP_DISABLE_STD_FILESYSTEM)
# Link target with pthread and dl for Unix
if (UNIX)
set(THREADS_PREFER_PTHREAD_FLAG ON)

16
include/SQLiteCpp/Database.h
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@ -33,6 +33,22 @@ __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_13_0
#define SQLITECPP_HAVE_STD_FILESYSTEM
#endif
// disable the support if the required header is not available
#ifdef __has_include
#ifndef __has_include(<filesystem>)
#undef SQLITECPP_HAVE_STD_FILESYSTEM
#endif
#ifndef __has_include(<experimental/filesystem>)
#undef SQLITECPP_HAVE_EXPERIMENTAL_FILESYSTEM
#endif
#endif
// C++17 allow to disable std::filesystem support
#ifdef SQLITECPP_DISABLE_STD_FILESYSTEM
#undef SQLITECPP_HAVE_STD_FILESYSTEM
#undef SQLITECPP_HAVE_STD_EXPERIMENTAL_FILESYSTEM
#endif
#ifdef SQLITECPP_HAVE_STD_FILESYSTEM
#include <filesystem>
#endif // c++17 and a suitable compiler

5
meson.build
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@ -20,6 +20,11 @@ unix_like_code = '''
'''
unix_like = cxx.compiles(unix_like_code, name : 'unix like environment')
## C++17 disable the support for std::filesystem (by default off)
if get_option('SQLITECPP_DISABLE_STD_FILESYSTEM')
sqlitecpp_cxx_flags += ['-DSQLITECPP_DISABLE_STD_FILESYSTEM']
endif
thread_dep = dependency('threads')
# sqlite3 support
sqlite3_dep = dependency(

2
meson_options.txt
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@ -9,6 +9,8 @@ option('SQLITE_ENABLE_ASSERT_HANDLER', type: 'boolean', value: false, descriptio
option('SQLITE_HAS_CODEC', type: 'boolean', value: false, description: 'Enable database encryption API. Not available in the public release of SQLite.')
## Force forward declaration of legacy struct sqlite3_value (pre SQLite 3.19)
option('SQLITE_USE_LEGACY_STRUCT', type: 'boolean', value: false, description: 'Fallback to forward declaration of legacy struct sqlite3_value (pre SQLite 3.19)')
## Disable the support for std::filesystem (C++17)
option('SQLITECPP_DISABLE_STD_FILESYSTEM', type: 'boolean', value: false, description: 'Disable the support for std::filesystem (C++17)')
## Enable build for the tests of SQLiteC++
option('SQLITECPP_BUILD_TESTS', type: 'boolean', value: false, description: 'Build SQLiteC++ unit tests.')
## Build the examples of SQLiteC++