v0.1_beta1: build fails for older distros

[pvanek]

Compton fails to build on older distros while all goes fine for current distributions.

all build logs:
https://build.opensuse.org/package/show/X11:QtDesktop/compton

example of failing log:
https://build.opensuse.org/package/live_build_log/X11:QtDesktop/compton/CentOS_CentOS-6/i586

[   86s] cc -std=c99 -DCONFIG_LIBCONFIG -DCONFIG_LIBCONFIG_LEGACY -DCONFIG_REGEX_PCRE -DCONFIG_REGEX_PCRE_JIT -DCONFIG_VSYNC_DRM -DCONFIG_VSYNC_OPENGL -DCONFIG_VSYNC_OPENGL_GLSL -DCONFIG_VSYNC_OPENGL_FBO -DCONFIG_VSYNC_OPENGL_VBO -DCONFIG_DBUS -DCONFIG_C2 -DCOMPTON_VERSION="\"0.1.0%\"" -DNDEBUG -O2 -D_FORTIFY_SOURCE=2 -Wall   -I/usr/include/libdrm   -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include   -c src/c2.c
[   86s] In file included from src/c2.c:11:
[   86s] src/c2.h:41: warning: declaration does not declare anything
[   86s] src/c2.h:50: error: unknown field 'l' specified in initializer
[   86s] src/c2.h:50: warning: excess elements in struct initializer
[   86s] src/c2.h:50: warning: (near initialization for 'C2_PTR_NULL')
[   86s] src/c2.h: In function 'c2_ptr_isempty':
[   86s] src/c2.h:236: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.h:236: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.h: In function 'c2h_comb_tree':
[   86s] src/c2.h:255: error: unknown field 'b' specified in initializer
[   86s] src/c2.h:256: warning: excess elements in struct initializer
[   86s] src/c2.h:256: warning: (near initialization for 'p')
[   86s] src/c2.h:258: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.h:259: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.h:260: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c: In function 'c2_parsed':
[   86s] src/c2.c:23: error: unknown field 'l' specified in initializer
[   86s] src/c2.c:23: warning: excess elements in struct initializer
[   86s] src/c2.c:23: warning: (near initialization for 'result')
[   86s] src/c2.c:38: error: unknown field 'l' specified in initializer
[   86s] src/c2.c:38: warning: excess elements in struct initializer
[   86s] src/c2.c:38: warning: (near initialization for 'lptr_def.ptr')
[   86s] src/c2.c: In function 'c2_parse_grp':
[   86s] src/c2.c:101: error: unknown field 'l' specified in initializer
[   86s] src/c2.c:101: warning: excess elements in struct initializer
[   86s] src/c2.c:101: warning: (near initialization for 'eles[0]')
[   86s] src/c2.c:101: error: unknown field 'l' specified in initializer
[   86s] src/c2.c:101: warning: excess elements in struct initializer
[   86s] src/c2.c:101: warning: (near initialization for 'eles[1]')
[   86s] src/c2.c:174: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:198: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c:208: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:208: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:210: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c:210: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_parse_target':
[   86s] src/c2.c:266: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c:267: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c:270: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_parse_op':
[   86s] src/c2.c:455: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_parse_pattern':
[   86s] src/c2.c:520: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_parse_legacy':
[   86s] src/c2.c:667: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_free':
[   86s] src/c2.c:828: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:839: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_dump_raw':
[   86s] src/c2.c:904: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:927: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c: In function 'c2_match_once':
[   86s] src/c2.c:1222: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:1254: error: 'c2_ptr_t' has no member named 'l'
[   86s] src/c2.c:1279: error: 'c2_ptr_t' has no member named 'b'
[   86s] src/c2.c:1279: error: 'c2_ptr_t' has no member named 'l'
[   86s] make: *** [c2.o] Error 1

[richardgv]

It has been there for quite a long period of time. A bug in <gcc-4.6. If for some reason you need to compile with such old gcc-s, apply the patch, please.

[pvanek]

OK, thanks.