add github action for c89 build (#13186)

* add retroarch.yml

* fix c89 errors

* attempt to add dependencies

* update comments

.github/workflows/retroarch.yml

@@ -0,0 +1,25 @@
+# Validates compilation of RetroArch binary
+
+name: RetroArch CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  linux-c89: # Smoketest build using most restrictive compiler and default options
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dependencies
+        run: sudo apt-get install build-essential libxkbcommon-dev libx11-xcb-dev zlib1g-dev libfreetype6-dev libegl1-mesa-dev libgles2-mesa-dev libgbm-dev nvidia-cg-toolkit nvidia-cg-dev libavcodec-dev libsdl2-dev libsdl-image1.2-dev libxml2-dev yasm
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Configure
+        run: ./configure
+      - name: Build
+        run: make C89_BUILD=1
+

Makefile

@@ -110,7 +110,7 @@ endif
 
 ifneq ($(CXX_BUILD), 1)
    ifneq ($(C89_BUILD),)
-      CFLAGS += -std=c89 -ansi -pedantic -Werror=pedantic -Wno-long-long
+      CFLAGS += -std=c89 -ansi -pedantic -Werror=pedantic -Wno-long-long -Werror=declaration-after-statement
    else ifeq ($(HAVE_C99), 1)
       CFLAGS += $(C99_CFLAGS)
    endif

input/connect/connect_ps3.c

@@ -72,17 +72,17 @@ struct __attribute__((__packed__)) sixaxis_activation_report {
 };
 
 union sixaxis_activation_report_f4 {
-   struct sixaxis_activation_report data;
    uint8_t buf[5];
+   struct sixaxis_activation_report data;
 };
 
 union sixaxis_output_report_01 {
-    struct sixaxis_output_report data;
     uint8_t buf[49];
+    struct sixaxis_output_report data;
 };
 
 static const union sixaxis_output_report_01 default_report = {
-    .buf = {
+    {
       0x01, /* report ID */
       0x00, /* padding */
       0xff, 0x00, /* right rumble */
@@ -101,7 +101,7 @@ static const union sixaxis_output_report_01 default_report = {
 };
 
 static const union sixaxis_activation_report_f4 ds3_activation_packet = {
-   .buf = { 0xF4, 0x42, 0x0c, 0x00, 0x00 }
+   { 0xF4, 0x42, 0x0c, 0x00, 0x00 }
 };
 
 /* forward declarations */

input/connect/connect_wiiugca.c

@@ -128,6 +128,7 @@ static int16_t hidpad_wiiugca_get_axis(void *pad_data, unsigned axis)
 {
    axis_data axis_data;
    gca_pad_data_t *pad = (gca_pad_data_t *)pad_data;
+   gca_device_data_t *device = (gca_device_data_t *)pad_data;
 
    gamepad_read_axis_data(axis, &axis_data);
 
@@ -136,7 +137,7 @@ static int16_t hidpad_wiiugca_get_axis(void *pad_data, unsigned axis)
 
    if(pad->datatype == GCA_TYPE_PAD)
       return gamepad_get_axis_value(pad->analog, &axis_data);
-   gca_device_data_t *device = (gca_device_data_t *)pad_data;
+
    return gamepad_get_axis_value(device->pad_data[0].analog, &axis_data);
 }
 

input/drivers/udev_input.c

@@ -746,11 +746,12 @@ static void udev_input_handle_hotplug(udev_input_t *udev)
    if ( dev_type  != UDEV_INPUT_KEYBOARD)
    {
       /*first clear all */
-      for (int i = 0; i < MAX_USERS; i++)
+      int i;
+      for (i = 0; i < MAX_USERS; i++)
         input_config_set_mouse_display_name(i, "N/A");
 
      /* Add what devices we have now */
-      for (int i = 0; i < udev->num_devices; ++i)
+      for (i = 0; i < udev->num_devices; ++i)
       {
          if (udev->devices[i]->type != UDEV_INPUT_KEYBOARD)
          {
@@ -1373,6 +1374,7 @@ static void *udev_input_init(const char *joypad_driver)
    int mouse = 0;
    int keyboard=0;
    int fd;
+   int i;
 #ifdef UDEV_XKB_HANDLING
    gfx_ctx_ident_t ctx_ident;
 #endif
@@ -1437,7 +1439,7 @@ static void *udev_input_init(const char *joypad_driver)
    RARCH_WARN("[udev]: Full-screen pointer won't be available.\n");
 #endif
 
-   for (int i = 0; i < udev->num_devices; ++i)
+   for (i = 0; i < udev->num_devices; ++i)
    {
       if (udev->devices[i]->type != UDEV_INPUT_KEYBOARD)
       {

input/input_driver.c

@@ -2682,7 +2682,7 @@ void input_config_reset(void)
 
       input_config_reset_autoconfig_binds(i);
 
-      input_st->libretro_input_binds[i] = &input_config_binds[i];
+      input_st->libretro_input_binds[i] = (const retro_keybind_set *)&input_config_binds[i];
    }
 }
 
@@ -3483,7 +3483,7 @@ void input_keys_pressed(
       bool is_menu,
       int input_hotkey_block_delay,
       input_bits_t *p_new_state,
-      retro_keybind_set *binds,
+      const retro_keybind_set *binds,
       const struct retro_keybind *binds_norm,
       const struct retro_keybind *binds_auto,
       const input_device_driver_t *joypad,
@@ -5348,7 +5348,7 @@ void input_driver_collect_system_input(input_driver_state_t *input_st,
             menu_input_active,
             block_delay,
             loop_bits,
-            input_config_binds,
+            (const retro_keybind_set *)input_config_binds,
             binds_norm,
             binds_auto,
             joypad,
@@ -5435,7 +5435,7 @@ void input_driver_collect_system_input(input_driver_state_t *input_st,
                      input_st->current_data,
                      joypad,
                      sec_joypad,
-                     &joypad_info, input_config_binds,
+                     &joypad_info, (const retro_keybind_set *)input_config_binds,
                      input_st->keyboard_mapping_blocked,
                      0,
                      RETRO_DEVICE_KEYBOARD, 0, ids[i][0]))

input/input_driver.h

@@ -132,8 +132,8 @@ struct input_keyboard_line
    bool enabled;
 };
 
-extern struct retro_keybind input_config_binds[MAX_USERS][RARCH_BIND_LIST_END];
-extern struct retro_keybind input_autoconf_binds[MAX_USERS][RARCH_BIND_LIST_END];
+extern retro_keybind_set input_config_binds[MAX_USERS];
+extern retro_keybind_set input_autoconf_binds[MAX_USERS];
 
 struct rarch_joypad_info
 {
@@ -1029,7 +1029,7 @@ void input_keys_pressed(
       bool is_menu,
       int input_hotkey_block_delay,
       input_bits_t *p_new_state,
-      retro_keybind_set *binds,
+      const retro_keybind_set *binds,
       const struct retro_keybind *binds_norm,
       const struct retro_keybind *binds_auto,
       const input_device_driver_t *joypad,

libretro-common/streams/file_stream.c

@@ -241,7 +241,11 @@ int filestream_vscanf(RFILE *stream, const char* format, va_list *args)
     *   cause the va_list to have an indeterminate value
     *   in the function calling filestream_vscanf(),
     *   leading to unexpected behaviour */
+#ifdef __va_copy
+   __va_copy(args_copy, *args);
+#else
    va_copy(args_copy, *args);
+#endif
 
    while (*format)
    {

tasks/task_powerstate.h

@@ -22,6 +22,8 @@
 #include <retro_common_api.h>
 #include <retro_miscellaneous.h>
 
+#include <frontend/frontend_driver.h>
+
 #ifdef HAVE_CONFIG_H
 #include "../config.h"
 #endif