make[4]: Entering directory '/build/lede-17.01/slaves/phase2/arc_archs/build/sdk/build_dir/target-arc_archs_uClibc-1.0.14/dump1090-2016-11-26'
fatal: Not a git repository (or any parent up to mount point /build/lede-17.01)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
ccache_cc -DMODES_DUMP1090_VERSION=\"\" -Os -pipe -matomic -marchs -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result  -Wformat -Werror=format-security -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro  -c mode_s.c -o mode_s.o
mode_s.c: In function 'decodeBDS20':
mode_s.c:758:5: error: 'for' loop initial declarations are only allowed in C99 mode
     for (int i = 0; i < 8; ++i) {
     ^
mode_s.c:758:5: note: use option -std=c99 or -std=gnu99 to compile your code
Makefile:49: recipe for target 'mode_s.o' failed
make[4]: *** [mode_s.o] Error 1
make[4]: Leaving directory '/build/lede-17.01/slaves/phase2/arc_archs/build/sdk/build_dir/target-arc_archs_uClibc-1.0.14/dump1090-2016-11-26'
Makefile:78: recipe for target '/build/lede-17.01/slaves/phase2/arc_archs/build/sdk/build_dir/target-arc_archs_uClibc-1.0.14/dump1090-2016-11-26/.built' failed
make[3]: *** [/build/lede-17.01/slaves/phase2/arc_archs/build/sdk/build_dir/target-arc_archs_uClibc-1.0.14/dump1090-2016-11-26/.built] Error 2