Switch atmosphere's build target to C++20. (#952)

* ams: update to build with gcc10/c++20

* remove mno-outline-atomics

* ams: take care of most TODO C++20s

* fusee/sept: update for gcc10

* whoosh, your code now uses pre-compiled headers

* make: dependency fixes

fusee/fusee-primary/src/fs_utils.c

@@ -23,13 +23,16 @@ FATFS sd_fs;
 static bool g_sd_mounted = false;
 static bool g_sd_initialized = false;
 static bool g_ahb_redirect_enabled = false;
+sdmmc_t g_sd_sdmmc;
+sdmmc_device_t g_sd_device;
+
 
 bool mount_sd(void)
 {
     /* Already mounted. */
     if (g_sd_mounted)
         return true;
-    
+
     /* Enable AHB redirection if necessary. */
     if (!g_ahb_redirect_enabled) {
         mc_enable_ahb_redirect();
@@ -41,7 +44,7 @@ bool mount_sd(void)
         if (sdmmc_device_sd_init(&g_sd_device, &g_sd_sdmmc, SDMMC_BUS_WIDTH_4BIT, SDMMC_SPEED_UHS_SDR104))
         {
             g_sd_initialized = true;
-            
+
             /* Mount SD. */
             if (f_mount(&sd_fs, "", 1) == FR_OK) {
                 print(SCREEN_LOG_LEVEL_INFO, "Mounted SD card!\n");
@@ -63,7 +66,7 @@ void unmount_sd(void)
         sdmmc_device_finish(&g_sd_device);
         g_sd_mounted = false;
     }
-    
+
     /* Disable AHB redirection if necessary. */
     if (g_ahb_redirect_enabled) {
         mc_disable_ahb_redirect();
@@ -81,13 +84,13 @@ uint32_t get_file_size(const char *filename)
     FIL f;
     if (f_open(&f, filename, FA_READ) != FR_OK)
         return 0;
-    
+
     /* Get the file size. */
     uint32_t file_size = f_size(&f);
-    
+
     /* Close the file. */
     f_close(&f);
-    
+
     return file_size;
 }
 
@@ -101,10 +104,10 @@ int read_from_file(void *dst, uint32_t dst_size, const char *filename)
     FIL f;
     if (f_open(&f, filename, FA_READ) != FR_OK)
         return 0;
-    
+
     /* Sync. */
     f_sync(&f);
-        
+
     /* Read from file. */
     UINT br = 0;
     int res = f_read(&f, dst, dst_size, &br);
@@ -118,7 +121,7 @@ int write_to_file(void *src, uint32_t src_size, const char *filename)
     /* SD card hasn't been mounted yet. */
     if (!g_sd_mounted)
         return 0;
-    
+
     /* Open the file for writing. */
     FIL f;
     if (f_open(&f, filename, FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)

fusee/fusee-primary/src/fs_utils.h

@@ -13,7 +13,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
- 
+
 #ifndef FUSEE_FS_UTILS_H
 #define FUSEE_FS_UTILS_H
 
@@ -23,8 +23,8 @@
 #include "sdmmc/sdmmc.h"
 #include "utils.h"
 
-sdmmc_t g_sd_sdmmc;
-sdmmc_device_t g_sd_device;
+extern sdmmc_t g_sd_sdmmc;
+extern sdmmc_device_t g_sd_device;
 
 bool mount_sd(void);
 void unmount_sd(void);

fusee/fusee-primary/src/lib/ini.c

@@ -70,7 +70,10 @@ static char* find_chars_or_comment(const char* s, const char* chars)
 /* Version of strncpy that ensures dest (size bytes) is null-terminated. */
 static char* strncpy0(char* dest, const char* src, size_t size)
 {
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-truncation"
     strncpy(dest, src, size - 1);
+#pragma GCC diagnostic pop
     dest[size - 1] = '\0';
     return dest;
 }