Add support for various environment variables, used in search paths.
Upstream status: https://github.com/libretro/RetroArch/pull/17440
diff --git a/configuration.c b/configuration.c
index 7eb6c08e1e..0449e77ac2 100644
--- a/configuration.c
+++ b/configuration.c
@@ -3568,6 +3568,14 @@ static bool config_load_file(global_t *global,
{
unsigned i;
char tmp_str[PATH_MAX_LENGTH];
+ char* libretro_directory = NULL;
+ char* libretro_assets_directory = NULL;
+ char* libretro_autoconfig_directory = NULL;
+ char* libretro_cheats_directory = NULL;
+ char* libretro_database_directory = NULL;
+ char* libretro_system_directory = NULL;
+ char* libretro_video_filter_directory = NULL;
+ char* libretro_video_shader_directory = NULL;
static bool first_load = true;
bool without_overrides = false;
unsigned msg_color = 0;
@@ -3862,6 +3870,38 @@ static bool config_load_file(global_t *global,
/* Post-settings load */
+ libretro_directory = getenv("LIBRETRO_DIRECTORY");
+ if (libretro_directory) {
+ configuration_set_string(settings,
+ settings->paths.directory_libretro, libretro_directory);
+ configuration_set_string(settings,
+ settings->paths.path_libretro_info, libretro_directory);
+ }
+
+ libretro_autoconfig_directory = getenv("LIBRETRO_AUTOCONFIG_DIRECTORY");
+ if (libretro_autoconfig_directory) /* override configuration value */
+ configuration_set_string(settings,
+ settings->paths.directory_autoconfig,
+ libretro_autoconfig_directory);
+
+ libretro_cheats_directory = getenv("LIBRETRO_CHEATS_DIRECTORY");
+ if (libretro_cheats_directory) /* override configuration value */
+ configuration_set_string(settings,
+ settings->paths.path_cheat_database,
+ libretro_cheats_directory);
+
+ libretro_database_directory = getenv("LIBRETRO_DATABASE_DIRECTORY");
+ if (libretro_database_directory) /* override configuration value */
+ configuration_set_string(settings,
+ settings->paths.path_content_database,
+ libretro_database_directory);
+
+ libretro_system_directory = getenv("LIBRETRO_SYSTEM_DIRECTORY");
+ if (libretro_system_directory) /* override configuration value */
+ configuration_set_string(settings,
+ settings->paths.directory_system,
+ libretro_system_directory);
+
if ( (rarch_flags & RARCH_FLAGS_HAS_SET_USERNAME)
&& (override_username))
{
@@ -4026,15 +4066,27 @@ static bool config_load_file(global_t *global,
*settings->paths.path_menu_wallpaper = '\0';
if (string_is_equal(settings->paths.path_rgui_theme_preset, "default"))
*settings->paths.path_rgui_theme_preset = '\0';
- if (string_is_equal(settings->paths.directory_video_shader, "default"))
+ libretro_video_shader_directory = getenv("LIBRETRO_VIDEO_SHADER_DIRECTORY");
+ if (libretro_video_shader_directory) { /* override configuration value */
+ configuration_set_string(settings, settings->paths.directory_video_shader,
+ libretro_video_shader_directory);
+ } else if (string_is_equal(settings->paths.directory_video_shader, "default"))
*settings->paths.directory_video_shader = '\0';
- if (string_is_equal(settings->paths.directory_video_filter, "default"))
+ libretro_video_filter_directory = getenv("LIBRETRO_VIDEO_FILTER_DIRECTORY");
+ if (libretro_video_filter_directory) { /* override configuration value */
+ configuration_set_string(settings, settings->paths.directory_video_filter,
+ libretro_video_filter_directory);
+ } else if (string_is_equal(settings->paths.directory_video_filter, "default"))
*settings->paths.directory_video_filter = '\0';
if (string_is_equal(settings->paths.directory_audio_filter, "default"))
*settings->paths.directory_audio_filter = '\0';
if (string_is_equal(settings->paths.directory_core_assets, "default"))
*settings->paths.directory_core_assets = '\0';
- if (string_is_equal(settings->paths.directory_assets, "default"))
+ libretro_assets_directory = getenv("LIBRETRO_ASSETS_DIRECTORY");
+ if (libretro_assets_directory) { /* override configuration value */
+ configuration_set_string(settings,
+ settings->paths.directory_assets, libretro_assets_directory);
+ } else if (string_is_equal(settings->paths.directory_assets, "default"))
*settings->paths.directory_assets = '\0';
#ifdef _3DS
if (string_is_equal(settings->paths.directory_bottom_assets, "default"))
diff --git a/docs/retroarch.6 b/docs/retroarch.6
index 7478040e17..d38a8ee565 100644
--- a/docs/retroarch.6
+++ b/docs/retroarch.6
@@ -1,6 +1,6 @@
.\" retroarch.6:
-.TH "RETROARCH" "6" "November 1, 2011" "RETROARCH" "System Manager's Manual: retroarch"
+.TH "RETROARCH" "6" "January 20, 2025" "RETROARCH" "System Manager's Manual: retroarch"
.SH NAME
@@ -239,3 +239,54 @@ Disables all kinds of content patching.
.TP
\fB-D, --detach\fR
Detach from the current console. This is currently only relevant for Microsoft Windows.
+
+.SH ENVIRONMENT
+\fBretroarch\fR honors the following environment variables:
+
+.TP
+\fBLIBRETRO_DIRECTORY\fR
+Specify the directory where RetroArch looks for core and info files,
+overriding the value of the "libretro_directory" configuration file
+option.
+
+.TP
+\fBLIBRETRO_ASSETS_DIRECTORY\fR
+Specify the directory where RetroArch looks for assets, overriding
+the value of the "assets_directory" configuration file
+option.
+
+.TP
+\fBLIBRETRO_AUTOCONFIG_DIRECTORY\fR
+Specify the directory where RetroArch looks for controller
+auto-configuration files, overriding the value of the
+"joypad_autoconfig_dir" configuration file option.
+
+.TP
+\fBLIBRETRO_CHEATS_DIRECTORY\fR
+Specify the directory where RetroArch looks for cheat files,
+overriding the value of the "cheat_database_path" configuration file
+option.
+
+.TP
+\fBLIBRETRO_DATABASE_DIRECTORY\fR
+Specify the directory where RetroArch looks for database files,
+overriding the value of the "content_database_path" configuration file
+option.
+
+.TP
+\fBLIBRETRO_SYSTEM_DIRECTORY\fR
+Specify the directory where RetroArch looks for system files,
+overriding the value of the "system_directory" configuration file
+option.
+
+.TP
+\fBLIBRETRO_VIDEO_FILTER_DIRECTORY\fR
+Specify the directory where RetroArch looks for video filters,
+overriding the value of the "video_filter_dir" configuration file
+option.
+
+.TP
+\fBLIBRETRO_VIDEO_SHADER_DIRECTORY\fR
+Specify the directory where RetroArch looks for video shaders,
+overriding the value of the "video_shader_dir" configuration file
+option.
diff --git a/frontend/drivers/platform_unix.c b/frontend/drivers/platform_unix.c
index 778f54eeda..cce011c875 100644
--- a/frontend/drivers/platform_unix.c
+++ b/frontend/drivers/platform_unix.c
@@ -1323,6 +1323,13 @@ static void frontend_unix_get_env(int *argc,
{
unsigned i;
const char* libretro_directory = getenv("LIBRETRO_DIRECTORY");
+ const char* libretro_assets_directory = getenv("LIBRETRO_ASSETS_DIRECTORY");
+ const char* libretro_autoconfig_directory = getenv("LIBRETRO_AUTOCONFIG_DIRECTORY");
+ const char* libretro_cheats_directory = getenv("LIBRETRO_CHEATS_DIRECTORY");
+ const char* libretro_database_directory = getenv("LIBRETRO_DATABASE_DIRECTORY");
+ const char* libretro_system_directory = getenv("LIBRETRO_SYSTEM_DIRECTORY");
+ const char* libretro_video_filter_directory = getenv("LIBRETRO_VIDEO_FILTER_DIRECTORY");
+ const char* libretro_video_shader_directory = getenv("LIBRETRO_VIDEO_SHADER_DIRECTORY");
#ifdef ANDROID
int32_t major, minor, rel;
char device_model[PROP_VALUE_MAX] = {0};
@@ -1764,12 +1771,20 @@ static void frontend_unix_get_env(int *argc,
"cores", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
else
#endif
- fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_CORE_INFO], base_path,
- "cores", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
+ if (!string_is_empty(libretro_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_CORE_INFO], libretro_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
+ else
+ fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_CORE_INFO], base_path,
+ "cores", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
#endif
- fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG], base_path,
- "autoconfig", sizeof(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG]));
-
+ if (!string_is_empty(libretro_autoconfig_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG],
+ libretro_autoconfig_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG]));
+ else
+ fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG], base_path,
+ "autoconfig", sizeof(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG]));
#ifdef ASSETS_DIR
if (path_is_directory(ASSETS_DIR "/assets"))
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_ASSETS],
@@ -1777,7 +1792,10 @@ static void frontend_unix_get_env(int *argc,
"assets", sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
else
#endif
- if (path_is_directory("/usr/local/share/retroarch/assets"))
+ if (!string_is_empty(libretro_assets_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_ASSETS], libretro_assets_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
+ else if (path_is_directory("/usr/local/share/retroarch/assets"))
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_ASSETS],
"/usr/local/share/retroarch",
"assets", sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
@@ -1837,7 +1855,11 @@ static void frontend_unix_get_env(int *argc,
"filters/video", sizeof(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER]));
else
#endif
- if (path_is_directory("/usr/local/share/retroarch/filters/video"))
+ if (!string_is_empty(libretro_video_filter_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER],
+ libretro_video_filter_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER]));
+ else if (path_is_directory("/usr/local/share/retroarch/filters/video"))
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER],
"/usr/local/share/retroarch",
"filters/video", sizeof(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER]));
@@ -1869,12 +1891,27 @@ static void frontend_unix_get_env(int *argc,
"records_config", sizeof(g_defaults.dirs[DEFAULT_DIR_RECORD_CONFIG]));
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_RECORD_OUTPUT], base_path,
"records", sizeof(g_defaults.dirs[DEFAULT_DIR_RECORD_OUTPUT]));
- fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_DATABASE], base_path,
- "database/rdb", sizeof(g_defaults.dirs[DEFAULT_DIR_DATABASE]));
- fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_SHADER], base_path,
- "shaders", sizeof(g_defaults.dirs[DEFAULT_DIR_SHADER]));
- fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_CHEATS], base_path,
- "cheats", sizeof(g_defaults.dirs[DEFAULT_DIR_CHEATS]));
+ if (!string_is_empty(libretro_database_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_DATABASE],
+ libretro_database_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_DATABASE]));
+ else
+ fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_DATABASE], base_path,
+ "database/rdb", sizeof(g_defaults.dirs[DEFAULT_DIR_DATABASE]));
+ if (!string_is_empty(libretro_video_shader_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_SHADER],
+ libretro_video_shader_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_SHADER]));
+ else
+ fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_SHADER], base_path,
+ "shaders", sizeof(g_defaults.dirs[DEFAULT_DIR_SHADER]));
+ if (!string_is_empty(libretro_cheats_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_CHEATS],
+ libretro_cheats_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_CHEATS]));
+ else
+ fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_CHEATS], base_path,
+ "cheats", sizeof(g_defaults.dirs[DEFAULT_DIR_CHEATS]));
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_OVERLAY], base_path,
"overlays", sizeof(g_defaults.dirs[DEFAULT_DIR_OVERLAY]));
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_OSK_OVERLAY], base_path,
@@ -1891,8 +1928,13 @@ static void frontend_unix_get_env(int *argc,
"saves", sizeof(g_defaults.dirs[DEFAULT_DIR_SRAM]));
fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_SAVESTATE], base_path,
"states", sizeof(g_defaults.dirs[DEFAULT_DIR_SAVESTATE]));
- fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_SYSTEM], base_path,
- "system", sizeof(g_defaults.dirs[DEFAULT_DIR_SYSTEM]));
+ if (!string_is_empty(libretro_system_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_SYSTEM],
+ libretro_system_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_SYSTEM]));
+ else
+ fill_pathname_join(g_defaults.dirs[DEFAULT_DIR_SYSTEM], base_path,
+ "system", sizeof(g_defaults.dirs[DEFAULT_DIR_SYSTEM]));
#endif
#ifndef IS_SALAMANDER
diff --git a/frontend/drivers/platform_win32.c b/frontend/drivers/platform_win32.c
index adb27b425c..f12fb8717e 100644
--- a/frontend/drivers/platform_win32.c
+++ b/frontend/drivers/platform_win32.c
@@ -566,24 +566,51 @@ static void frontend_win32_env_get(int *argc, char *argv[],
{
const char *tmp_dir = getenv("TMP");
const char *libretro_directory = getenv("LIBRETRO_DIRECTORY");
+ const char *libretro_assets_directory = getenv("LIBRETRO_ASSETS_DIRECTORY");
+ const char* libretro_autoconfig_directory = getenv("LIBRETRO_AUTOCONFIG_DIRECTORY");
+ const char* libretro_cheats_directory = getenv("LIBRETRO_CHEATS_DIRECTORY");
+ const char* libretro_database_directory = getenv("LIBRETRO_DATABASE_DIRECTORY");
+ const char* libretro_system_directory = getenv("LIBRETRO_SYSTEM_DIRECTORY");
+ const char* libretro_video_filter_directory = getenv("LIBRETRO_VIDEO_FILTER_DIRECTORY");
+ const char* libretro_video_shader_directory = getenv("LIBRETRO_VIDEO_SHADER_DIRECTORY");
if (!string_is_empty(tmp_dir))
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CACHE],
tmp_dir, sizeof(g_defaults.dirs[DEFAULT_DIR_CACHE]));
gfx_set_dwm();
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_ASSETS],
- ":\\assets", sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
+ if (!string_is_empty(libretro_assets_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_ASSETS], libretro_assets_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
+ else
+ fill_pathname_expand_special(
+ g_defaults.dirs[DEFAULT_DIR_ASSETS],
+ ":\\assets", sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_AUDIO_FILTER],
":\\filters\\audio", sizeof(g_defaults.dirs[DEFAULT_DIR_AUDIO_FILTER]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER],
- ":\\filters\\video", sizeof(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CHEATS],
- ":\\cheats", sizeof(g_defaults.dirs[DEFAULT_DIR_CHEATS]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_DATABASE],
- ":\\database\\rdb", sizeof(g_defaults.dirs[DEFAULT_DIR_DATABASE]));
+ if (!string_is_empty(libretro_video_filter_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER],
+ libretro_video_filter_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER],
+ ":\\filters\\video", sizeof(g_defaults.dirs[DEFAULT_DIR_VIDEO_FILTER]));
+ if (!string_is_empty(libretro_cheats_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_CHEATS],
+ libretro_cheats_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_CHEATS]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CHEATS],
+ ":\\cheats", sizeof(g_defaults.dirs[DEFAULT_DIR_CHEATS]));
+ if (!string_is_empty(libretro_database_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_DATABASE],
+ libretro_database_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_DATABASE]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_DATABASE],
+ ":\\database\\rdb", sizeof(g_defaults.dirs[DEFAULT_DIR_DATABASE]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_PLAYLIST],
- ":\\playlists", sizeof(g_defaults.dirs[DEFAULT_DIR_ASSETS]));
+ ":\\playlists", sizeof(g_defaults.dirs[DEFAULT_DIR_PLAYLIST]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_RECORD_CONFIG],
":\\config\\record", sizeof(g_defaults.dirs[DEFAULT_DIR_RECORD_CONFIG]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_RECORD_OUTPUT],
@@ -606,12 +633,26 @@ static void frontend_win32_env_get(int *argc, char *argv[],
else
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CORE],
":\\cores", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CORE_INFO],
- ":\\info", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG],
- ":\\autoconfig", sizeof(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_SHADER],
- ":\\shaders", sizeof(g_defaults.dirs[DEFAULT_DIR_SHADER]));
+ if (!string_is_empty(libretro_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_CORE_INFO], libretro_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CORE_INFO],
+ ":\\info", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_INFO]));
+ if (!string_is_empty(libretro_autoconfig_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG],
+ libretro_autoconfig_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG],
+ ":\\autoconfig", sizeof(g_defaults.dirs[DEFAULT_DIR_AUTOCONFIG]));
+ if (!string_is_empty(libretro_video_filter_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_SHADER],
+ libretro_video_shader_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_SHADER]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_SHADER],
+ ":\\shaders", sizeof(g_defaults.dirs[DEFAULT_DIR_SHADER]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_CORE_ASSETS],
":\\downloads", sizeof(g_defaults.dirs[DEFAULT_DIR_CORE_ASSETS]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_SCREENSHOT],
@@ -620,8 +661,13 @@ static void frontend_win32_env_get(int *argc, char *argv[],
":\\saves", sizeof(g_defaults.dirs[DEFAULT_DIR_SRAM]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_SAVESTATE],
":\\states", sizeof(g_defaults.dirs[DEFAULT_DIR_SAVESTATE]));
- fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_SYSTEM],
- ":\\system", sizeof(g_defaults.dirs[DEFAULT_DIR_SYSTEM]));
+ if (!string_is_empty(libretro_system_directory))
+ strlcpy(g_defaults.dirs[DEFAULT_DIR_SYSTEM],
+ libretro_system_directory,
+ sizeof(g_defaults.dirs[DEFAULT_DIR_SYSTEM]));
+ else
+ fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_SYSTEM],
+ ":\\system", sizeof(g_defaults.dirs[DEFAULT_DIR_SYSTEM]));
fill_pathname_expand_special(g_defaults.dirs[DEFAULT_DIR_LOGS],
":\\logs", sizeof(g_defaults.dirs[DEFAULT_DIR_LOGS]));
diff --git a/retroarch.c b/retroarch.c
index a7e5f5299f..59d7879ec5 100644
--- a/retroarch.c
+++ b/retroarch.c
@@ -6516,7 +6516,28 @@ static void retroarch_print_help(const char *arg0)
"Path for the save state files (*.state). (DEPRECATED, use --appendconfig and savestate_directory)\n"
, sizeof(buf) - _len);
+ /* Flush buffer here to avoid the error "error: string length ‘752’
+ * is greater than the length ‘509’ ISO C90 compilers are required
+ * to support" */
fputs(buf, stdout);
+
+#if defined(__linux__) || defined(__GNU__) || (defined(BSD) && !defined(__MACH__))
+ buf[0] = '\0';
+ _len = 0;
+ _len += strlcpy(buf + _len,
+ "\nThe following environment variables are supported:\n\n"
+ " LIBRETRO_ASSETS_DIRECTORY\n"
+ " LIBRETRO_AUTOCONFIG_DIRECTORY\n"
+ " LIBRETRO_CHEATS_DIRECTORY\n"
+ " LIBRETRO_DATABASE_DIRECTORY\n"
+ " LIBRETRO_DIRECTORY\n"
+ " LIBRETRO_SYSTEM_DIRECTORY\n"
+ " LIBRETRO_VIDEO_FILTER_DIRECTORY\n"
+ " LIBRETRO_VIDEO_SHADER_DIRECTORY\n\n"
+ "Refer to `man 6 retroarch' for a description of what they do.\n"
+ , sizeof(buf) - _len);
+ fputs(buf, stdout);
+#endif
}
#ifdef HAVE_DYNAMIC
