Avoid these warnings from being errors:
usbredirhost.c: In function 'usbredirhost_can_write_iso_package':
usbredirhost.c:1023:19: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
DEBUG("START dropping isoc packets %lu buffer > %lu hi threshold",
^
usbredirhost.c:1023:19: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
DEBUG("START dropping isoc packets %lu buffer > %lu hi threshold",
^
usbredirhost.c:1028:19: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
DEBUG("STOP dropping isoc packets %lu buffer < %lu low threshold",
^
usbredirhost.c:1028:19: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
DEBUG("STOP dropping isoc packets %lu buffer < %lu low threshold",
^
usbredirhost.c: In function 'usbredirhost_set_iso_threshold':
usbredirhost.c:1162:11: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
DEBUG("higher threshold is %lu bytes | lower threshold is %lu bytes",
^
usbredirhost.c:1162:11: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
DEBUG("higher threshold is %lu bytes | lower threshold is %lu bytes",
I think in all of these cases, the incorrect format modifier just causes
wrong debug prints on i686.
Since some changes to the setuid wrappers, there is a symlink involved
and it doesn't resolve correctly inside the chroot. Do the check inside
the chroot to make it work again.
Obviously there are more improvements that can be done here,
especially moving headers to .dev, but that's not entirely trivial and
probably not worth it since kde4 is old.
This ensures that most "trivial" derivations used to build NixOS
configurations no longer depend on GCC. For commands that do invoke
gcc, there is runCommandCC.