Add more const

While I'm not very fond of "const", it's important for declarations
(it decides whether a symbol is emitted in a read-only or read/write
section). Fix all these cases, so we have writeable global data only
when we really need.

13 files changed, 67 insertions, 71 deletions

diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index 1d04b5cd3d..5b8cdc3e50 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -88,7 +88,7 @@ const struct vd_lavc_hwdec mp_vd_lavc_vda;
 const struct vd_lavc_hwdec mp_vd_lavc_vaapi;
 const struct vd_lavc_hwdec mp_vd_lavc_vaapi_copy;
 
-static const struct vd_lavc_hwdec *hwdec_list[] = {
+static const struct vd_lavc_hwdec *const hwdec_list[] = {
 #if HAVE_VDPAU_HWACCEL
     &mp_vd_lavc_vdpau,
 #endif
diff --git a/video/filter/vf_noise.c b/video/filter/vf_noise.c
index 3046315219..acf8f4f0fd 100644
--- a/video/filter/vf_noise.c
+++ b/video/filter/vf_noise.c
@@ -73,7 +73,7 @@ struct vf_priv_s {
 static int nonTempRandShift_init;
 static int nonTempRandShift[MAX_RES];
 
-static int patt[4] = {
+static const int patt[4] = {
     -1,0,1,0
 };
 
diff --git a/video/filter/vf_rotate.c b/video/filter/vf_rotate.c
index ad691a544e..6328e75722 100644
--- a/video/filter/vf_rotate.c
+++ b/video/filter/vf_rotate.c
@@ -36,7 +36,7 @@ static int vf_open(vf_instance_t *vf)
 {
     struct vf_priv_s *p = vf->priv;
 
-    static const char *rot[] = {
+    static const char *const rot[] = {
         "null",
         "transpose=clock",
         "vflip,hflip",
diff --git a/video/filter/vf_scale.c b/video/filter/vf_scale.c
index 730994c12c..f11fd58a65 100644
--- a/video/filter/vf_scale.c
+++ b/video/filter/vf_scale.c
@@ -137,7 +137,7 @@ static const unsigned int outfmt_list[] = {
  * or to stop vf_scale from choosing a conversion that has no
  * fast assembler implementation.
  */
-static int preferred_conversions[][2] = {
+static const int preferred_conversions[][2] = {
     {IMGFMT_YUYV, IMGFMT_UYVY},
     {IMGFMT_YUYV, IMGFMT_422P},
     {IMGFMT_UYVY, IMGFMT_YUYV},
diff --git a/video/image_writer.c b/video/image_writer.c
index af1dab294c..f1318512b3 100644
--- a/video/image_writer.c
+++ b/video/image_writer.c
@@ -57,7 +57,7 @@ const struct image_writer_opts image_writer_opts_defaults = {
 #define OPT_BASE_STRUCT struct image_writer_opts
 
 const struct m_sub_options image_writer_conf = {
-    .opts = (m_option_t[]) {
+    .opts = (const m_option_t[]) {
         OPT_INTRANGE("jpeg-quality", jpeg_quality, 0, 0, 100),
         OPT_INTRANGE("jpeg-optimize", jpeg_optimize, 0, 0, 100),
         OPT_INTRANGE("jpeg-smooth", jpeg_smooth, 0, 0, 100),
@@ -82,7 +82,7 @@ struct image_writer_ctx {
 struct img_writer {
     const char *file_ext;
     int (*write)(struct image_writer_ctx *ctx, mp_image_t *image, FILE *fp);
-    int *pixfmts;
+    const int *pixfmts;
     int lavc_codec;
 };
 
@@ -219,16 +219,16 @@ static const struct img_writer img_writers[] = {
     { "ppm", write_lavc, .lavc_codec = AV_CODEC_ID_PPM },
     { "pgm", write_lavc,
       .lavc_codec = AV_CODEC_ID_PGM,
-      .pixfmts = (int[]) { IMGFMT_Y8, 0 },
+      .pixfmts = (const int[]) { IMGFMT_Y8, 0 },
     },
     { "pgmyuv", write_lavc,
       .lavc_codec = AV_CODEC_ID_PGMYUV,
-      .pixfmts = (int[]) { IMGFMT_420P, 0 },
+      .pixfmts = (const int[]) { IMGFMT_420P, 0 },
     },
     { "tga", write_lavc,
       .lavc_codec = AV_CODEC_ID_TARGA,
-      .pixfmts = (int[]) { IMGFMT_BGR24, IMGFMT_BGRA, IMGFMT_BGR15_LE,
-                           IMGFMT_Y8, 0},
+      .pixfmts = (const int[]) { IMGFMT_BGR24, IMGFMT_BGRA, IMGFMT_BGR15_LE,
+                                 IMGFMT_Y8, 0},
     },
 #if HAVE_JPEG
     { "jpg", write_jpeg },
@@ -277,7 +277,7 @@ int write_image(struct mp_image *image, const struct image_writer_opts *opts,
 
     if (writer->pixfmts) {
         destfmt = writer->pixfmts[0];   // default to first pixel format
-        for (int *fmt = writer->pixfmts; *fmt; fmt++) {
+        for (const int *fmt = writer->pixfmts; *fmt; fmt++) {
             if (*fmt == image->imgfmt) {
                 destfmt = *fmt;
                 break;
diff --git a/video/out/gl_common.c b/video/out/gl_common.c
index 4ed76caeeb..243f442b4d 100644
--- a/video/out/gl_common.c
+++ b/video/out/gl_common.c
@@ -156,17 +156,17 @@ struct gl_functions {
     int ver_core;               // introduced as required function
     int ver_removed;            // removed as required function (no replacement)
     bool partial_ok;            // loading only some functions is ok
-    struct gl_function *functions;
+    const struct gl_function *functions;
 };
 
 #define MAX_FN_COUNT 50         // max functions per gl_functions section
 
-struct gl_functions gl_functions[] = {
+static const struct gl_functions gl_functions[] = {
     // GL functions which are always available anywhere at least since 1.1
     {
         .ver_core = MPGL_VER(1, 1),
         .provides = MPGL_CAP_GL,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(Viewport),
             DEF_FN(Clear),
             DEF_FN(GenTextures),
@@ -204,7 +204,7 @@ struct gl_functions gl_functions[] = {
     {
         .ver_core = MPGL_VER(2, 0),
         .provides = MPGL_CAP_GL2,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(GenBuffers),
             DEF_FN(DeleteBuffers),
             DEF_FN(BindBuffer),
@@ -248,7 +248,7 @@ struct gl_functions gl_functions[] = {
     {
         .ver_core = MPGL_VER(2, 1),
         .provides = MPGL_CAP_GL21,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(UniformMatrix4x3fv),
             {0}
         },
@@ -257,7 +257,7 @@ struct gl_functions gl_functions[] = {
     {
         .ver_core = MPGL_VER(3, 0),
         .provides = MPGL_CAP_GL3 | MPGL_CAP_SRGB_TEX | MPGL_CAP_SRGB_FB,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(GetStringi),
             {0}
         },
@@ -267,7 +267,7 @@ struct gl_functions gl_functions[] = {
         .ver_core = MPGL_VER(3, 0),
         .extension = "GL_ARB_framebuffer_object",
         .provides = MPGL_CAP_FB,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(BindFramebuffer),
             DEF_FN(GenFramebuffers),
             DEF_FN(DeleteFramebuffers),
@@ -281,7 +281,7 @@ struct gl_functions gl_functions[] = {
         .ver_removed = MPGL_VER(3, 0), // don't touch these fn names in 3.x
         .extension = "GL_EXT_framebuffer_object",
         .provides = MPGL_CAP_FB,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN_NAMES(BindFramebuffer, "glBindFramebufferEXT"),
             DEF_FN_NAMES(GenFramebuffers, "glGenFramebuffersEXT"),
             DEF_FN_NAMES(DeleteFramebuffers, "glDeleteFramebuffersEXT"),
@@ -295,7 +295,7 @@ struct gl_functions gl_functions[] = {
         .ver_core = MPGL_VER(3, 0),
         .extension = "GL_ARB_vertex_array_object",
         .provides = MPGL_CAP_VAO,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(GenVertexArrays),
             DEF_FN(BindVertexArray),
             DEF_FN(DeleteVertexArrays),
@@ -307,33 +307,33 @@ struct gl_functions gl_functions[] = {
         .ver_core = MPGL_VER(3, 0),
         .extension = "GL_EXT_texture_sRGB",
         .provides = MPGL_CAP_SRGB_TEX,
-        .functions = (struct gl_function[]) {{0}},
+        .functions = (const struct gl_function[]) {{0}},
     },
     // sRGB framebuffers, extension in GL 2.x, core in GL 3.x core.
     {
         .ver_core = MPGL_VER(3, 0),
         .extension = "GL_EXT_framebuffer_sRGB",
         .provides = MPGL_CAP_SRGB_FB,
-        .functions = (struct gl_function[]) {{0}},
+        .functions = (const struct gl_function[]) {{0}},
     },
     // Float textures, extension in GL 2.x, core in GL 3.x core.
     {
         .ver_core = MPGL_VER(3, 0),
         .extension = "GL_ARB_texture_float",
         .provides = MPGL_CAP_FLOAT_TEX,
-        .functions = (struct gl_function[]) {{0}},
+        .functions = (const struct gl_function[]) {{0}},
     },
     // GL_RED / GL_RG textures, extension in GL 2.x, core in GL 3.x core.
     {
         .ver_core = MPGL_VER(3, 0),
         .extension = "GL_ARB_texture_rg",
         .provides = MPGL_CAP_TEX_RG,
-        .functions = (struct gl_function[]) {{0}},
+        .functions = (const struct gl_function[]) {{0}},
     },
     // Swap control, always an OS specific extension
     {
         .extension = "_swap_control",
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN_NAMES(SwapInterval, "glXSwapIntervalSGI", "glXSwapInterval",
                          "wglSwapIntervalSGI", "wglSwapInterval",
                          "wglSwapIntervalEXT"),
@@ -345,7 +345,7 @@ struct gl_functions gl_functions[] = {
         .ver_core = MPGL_VER(1, 1),
         .ver_removed = MPGL_VER(3, 0),
         .provides = MPGL_CAP_GL_LEGACY,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN(Begin),
             DEF_FN(End),
             DEF_FN(MatrixMode),
@@ -381,7 +381,7 @@ struct gl_functions gl_functions[] = {
     {
         .ver_removed = MPGL_VER(2, 1),
         .partial_ok = true,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN_NAMES(GenBuffers, "glGenBuffers", "glGenBuffersARB"),
             DEF_FN_NAMES(DeleteBuffers, "glDeleteBuffers", "glDeleteBuffersARB"),
             DEF_FN_NAMES(BindBuffer, "glBindBuffer", "glBindBufferARB"),
@@ -399,7 +399,7 @@ struct gl_functions gl_functions[] = {
     {
         .extension = "_program",
         .ver_removed = MPGL_VER(3, 0),
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN_NAMES(GenPrograms, "glGenProgramsARB"),
             DEF_FN_NAMES(DeletePrograms, "glDeleteProgramsARB"),
             DEF_FN_NAMES(BindProgram, "glBindProgramARB"),
@@ -413,7 +413,7 @@ struct gl_functions gl_functions[] = {
     {
         .extension = "ATI_fragment_shader",
         .ver_removed = MPGL_VER(3, 0),
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             DEF_FN_NAMES(BeginFragmentShader, "glBeginFragmentShaderATI"),
             DEF_FN_NAMES(EndFragmentShader, "glEndFragmentShaderATI"),
             DEF_FN_NAMES(SampleMap, "glSampleMapATI"),
@@ -428,7 +428,7 @@ struct gl_functions gl_functions[] = {
     {
         .extension = "GL_NV_vdpau_interop",
         .provides = MPGL_CAP_VDPAU,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             // (only functions needed by us)
             DEF_FN(VDPAUInitNV),
             DEF_FN(VDPAUFiniNV),
@@ -446,7 +446,7 @@ struct gl_functions gl_functions[] = {
     {
         .extension = "GL_APPLE_rgb_422",
         .provides = MPGL_CAP_APPLE_RGB_422,
-        .functions = (struct gl_function[]) {
+        .functions = (const struct gl_function[]) {
             {0}
         },
     },
@@ -529,7 +529,7 @@ void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
     mp_dbg(log, "Combined OpenGL extensions string:\n%s\n", gl->extensions);
 
     for (int n = 0; n < sizeof(gl_functions) / sizeof(gl_functions[0]); n++) {
-        struct gl_functions *section = &gl_functions[n];
+        const struct gl_functions *section = &gl_functions[n];
 
         // With has_legacy, the legacy functions are still available, and
         // functions are never actually removed. (E.g. the context could be at
@@ -558,7 +558,7 @@ void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
         bool all_loaded = true;
 
         for (int i = 0; section->functions[i].funcnames[0]; i++) {
-            struct gl_function *fn = &section->functions[i];
+            const struct gl_function *fn = &section->functions[i];
             void *ptr = NULL;
             for (int x = 0; fn->funcnames[x]; x++) {
                 ptr = getProcAddress((const GLubyte *)fn->funcnames[x]);
@@ -583,7 +583,7 @@ void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
         if (all_loaded || section->partial_ok) {
             gl->mpgl_caps |= section->provides;
             for (int i = 0; section->functions[i].funcnames[0]; i++) {
-                struct gl_function *fn = &section->functions[i];
+                const struct gl_function *fn = &section->functions[i];
                 void **funcptr = (void**)(((char*)gl) + fn->offset);
                 if (loaded[i])
                     *funcptr = loaded[i];
@@ -853,7 +853,7 @@ struct backend {
     MPGLSetBackendFn init;
 };
 
-static struct backend backends[] = {
+static const struct backend backends[] = {
 #if HAVE_GL_COCOA
     {"cocoa", mpgl_set_backend_cocoa},
 #endif
@@ -1014,7 +1014,7 @@ extern const struct gl_hwdec_driver gl_hwdec_vaglx;
 extern const struct gl_hwdec_driver gl_hwdec_vda;
 extern const struct gl_hwdec_driver gl_hwdec_vdpau;
 
-const struct gl_hwdec_driver *mpgl_hwdec_drivers[] = {
+const struct gl_hwdec_driver *const mpgl_hwdec_drivers[] = {
 #if HAVE_VAAPI_GLX
     &gl_hwdec_vaglx,
 #endif
diff --git a/video/out/gl_common.h b/video/out/gl_common.h
index 622f1f2659..75ff0d5dfd 100644
--- a/video/out/gl_common.h
+++ b/video/out/gl_common.h
@@ -206,7 +206,7 @@ struct gl_hwdec_driver {
     void (*destroy)(struct gl_hwdec *hw);
 };
 
-extern const struct gl_hwdec_driver *mpgl_hwdec_drivers[];
+extern const struct gl_hwdec_driver *const mpgl_hwdec_drivers[];
 
 void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
                          const char *ext2, struct mp_log *log);
diff --git a/video/out/gl_lcms.c b/video/out/gl_lcms.c
index ad1bd1bb96..adda52b145 100644
--- a/video/out/gl_lcms.c
+++ b/video/out/gl_lcms.c
@@ -69,7 +69,7 @@ static int validate_3dlut_size_opt(struct mp_log *log, const m_option_t *opt,
 
 #define OPT_BASE_STRUCT struct mp_icc_opts
 const struct m_sub_options mp_icc_conf = {
-    .opts = (m_option_t[]) {
+    .opts = (const m_option_t[]) {
         OPT_STRING("icc-profile", profile, 0),
         OPT_FLAG("icc-profile-auto", profile_auto, 0),
         OPT_STRING("icc-cache", cache, 0),
@@ -250,7 +250,7 @@ error_exit:
 #else /* HAVE_LCMS2 */
 
 const struct m_sub_options mp_icc_conf = {
-    .opts = (m_option_t[]) { {0} },
+    .opts = (const m_option_t[]) { {0} },
     .size = sizeof(struct mp_icc_opts),
     .defaults = &(const struct mp_icc_opts) {0},
 };
diff --git a/video/out/gl_video.c b/video/out/gl_video.c
index ab56ca51a8..1b83d416ce 100644
--- a/video/out/gl_video.c
+++ b/video/out/gl_video.c
@@ -55,7 +55,7 @@ static const char vo_opengl_shaders[] =
 
 // lscale/cscale arguments that map directly to shader filter routines.
 // Note that the convolution filters are not included in this list.
-static const char *fixed_scale_filters[] = {
+static const char *const fixed_scale_filters[] = {
     "bilinear",
     "bicubic_fast",
     "sharpen3",
@@ -73,7 +73,7 @@ struct lut_tex_format {
 // This must match the weightsN functions in the shader.
 // Each entry uses (size+3)/4 pixels per LUT entry, and size/pixels components
 // per pixel.
-struct lut_tex_format lut_tex_formats[] = {
+const struct lut_tex_format lut_tex_formats[] = {
     [2] =  {1, GL_RG16F,   GL_RG},
     [4] =  {1, GL_RGBA16F, GL_RGBA},
     [6] =  {2, GL_RGB16F,  GL_RGB},
@@ -271,7 +271,7 @@ static const struct packed_fmt_entry mp_packed_formats[] = {
     {0},
 };
 
-static const char *osd_shaders[SUBBITMAP_COUNT] = {
+static const char *const osd_shaders[SUBBITMAP_COUNT] = {
     [SUBBITMAP_LIBASS] = "frag_osd_libass",
     [SUBBITMAP_RGBA] =   "frag_osd_rgba",
 };
@@ -303,7 +303,7 @@ static int validate_scaler_opt(struct mp_log *log, const m_option_t *opt,
 
 #define OPT_BASE_STRUCT struct gl_video_opts
 const struct m_sub_options gl_video_conf = {
-    .opts = (m_option_t[]) {
+    .opts = (const m_option_t[]) {
         OPT_FLOATRANGE("gamma", gamma, 0, 0.0, 10.0),
         OPT_FLAG("srgb", srgb, 0),
         OPT_FLAG("approx-gamma", approx_gamma, 0),
@@ -1046,7 +1046,7 @@ static void init_scaler(struct gl_video *p, struct scaler *scaler)
 
     int size = scaler->kernel->size;
     assert(size < FF_ARRAY_ELEMS(lut_tex_formats));
-    struct lut_tex_format *fmt = &lut_tex_formats[size];
+    const struct lut_tex_format *fmt = &lut_tex_formats[size];
     bool use_2d = fmt->pixels > 1;
     bool is_luma = scaler->index == 0;
     scaler->lut_name = use_2d
@@ -1854,7 +1854,7 @@ static bool test_fbo(struct gl_video *p, GLenum format)
         0xFFFFFF / (float)(1 << 25),    // float mantissa
         2,                              // out of range value
     };
-    static const char *val_names[] = {
+    static const char *const val_names[] = {
         "8-bit precision",
         "16-bit precision",
         "full float",
@@ -2237,7 +2237,7 @@ static const char* handle_scaler_opt(const char *name)
         if (can_use_filter_kernel(kernel))
             return kernel->name;
 
-        for (const char **filter = fixed_scale_filters; *filter; filter++) {
+        for (const char *const *filter = fixed_scale_filters; *filter; filter++) {
             if (strcmp(*filter, name) == 0)
                 return *filter;
         }
@@ -2289,7 +2289,7 @@ static int validate_scaler_opt(struct mp_log *log, const m_option_t *opt,
 {
     if (bstr_equals0(param, "help")) {
         mp_info(log, "Available scalers:\n");
-        for (const char **filter = fixed_scale_filters; *filter; filter++)
+        for (const char *const *filter = fixed_scale_filters; *filter; filter++)
             mp_info(log, "    %s\n", *filter);
         for (int n = 0; mp_filter_kernels[n].name; n++)
             mp_info(log, "    %s\n", mp_filter_kernels[n].name);
diff --git a/video/out/vo.c b/video/out/vo.c
index 60ee2ac8bd..76f980ce5a 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -47,24 +47,24 @@
 //
 // Externally visible list of all vo drivers
 //
-extern struct vo_driver video_out_x11;
-extern struct vo_driver video_out_vdpau;
-extern struct vo_driver video_out_xv;
-extern struct vo_driver video_out_opengl;
-extern struct vo_driver video_out_opengl_hq;
-extern struct vo_driver video_out_opengl_old;
-extern struct vo_driver video_out_null;
-extern struct vo_driver video_out_image;
-extern struct vo_driver video_out_lavc;
-extern struct vo_driver video_out_caca;
-extern struct vo_driver video_out_direct3d;
-extern struct vo_driver video_out_direct3d_shaders;
-extern struct vo_driver video_out_sdl;
-extern struct vo_driver video_out_corevideo;
-extern struct vo_driver video_out_vaapi;
-extern struct vo_driver video_out_wayland;
-
-const struct vo_driver *video_out_drivers[] =
+extern const struct vo_driver video_out_x11;
+extern const struct vo_driver video_out_vdpau;
+extern const struct vo_driver video_out_xv;
+extern const struct vo_driver video_out_opengl;
+extern const struct vo_driver video_out_opengl_hq;
+extern const struct vo_driver video_out_opengl_old;
+extern const struct vo_driver video_out_null;
+extern const struct vo_driver video_out_image;
+extern const struct vo_driver video_out_lavc;
+extern const struct vo_driver video_out_caca;
+extern const struct vo_driver video_out_direct3d;
+extern const struct vo_driver video_out_direct3d_shaders;
+extern const struct vo_driver video_out_sdl;
+extern const struct vo_driver video_out_corevideo;
+extern const struct vo_driver video_out_vaapi;
+extern const struct vo_driver video_out_wayland;
+
+const struct vo_driver *const video_out_drivers[] =
 {
 #if HAVE_VDPAU
         &video_out_vdpau,
diff --git a/video/out/vo.h b/video/out/vo.h
index 1a7fdb4901..83e819d8e6 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -288,9 +288,6 @@ void vo_destroy(struct vo *vo);
 
 const char *vo_get_window_title(struct vo *vo);
 
-// NULL terminated array of all drivers
-extern const struct vo_driver *video_out_drivers[];
-
 struct mp_keymap {
   int from;
   int to;
diff --git a/video/out/wayland_common.c b/video/out/wayland_common.c
index 19ddb16cbf..80b5ca7f29 100644
--- a/video/out/wayland_common.c
+++ b/video/out/wayland_common.c
@@ -596,8 +596,7 @@ static const struct wl_registry_listener registry_listener = {
 
 static int lookupkey(int key)
 {
-    static const char *passthrough_keys
-        = " -+*/<>`~!@#$%^&()_{}:;\"\',.?\\|=[]";
+    const char *passthrough_keys = " -+*/<>`~!@#$%^&()_{}:;\"\',.?\\|=[]";
 
     int mpkey = 0;
     if ((key >= 'a' && key <= 'z') ||
diff --git a/video/out/x11_common.c b/video/out/x11_common.c
index 90333e8a7c..56ee4833fb 100644
--- a/video/out/x11_common.c
+++ b/video/out/x11_common.c
@@ -513,7 +513,7 @@ static const struct mp_keymap keymap[] = {
 
 static int vo_x11_lookupkey(int key)
 {
-    static const char *passthrough_keys = " -+*/<>`~!@#$%^&()_{}:;\"\',.?\\|=[]";
+    const char *passthrough_keys = " -+*/<>`~!@#$%^&()_{}:;\"\',.?\\|=[]";
     int mpkey = 0;
     if ((key >= 'a' && key <= 'z') ||
         (key >= 'A' && key <= 'Z') ||