After git log "10 hours ago Daniel Golle postgresql: properly handle pg_config host build".
make firmware failed with:
make[8]: Leaving directory `/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12/src/common'
mipsel-openwrt-linux-musl-gcc -Wall -Wmissing-prototypes -Wpointer-arith -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -iremap/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12:postgresql-9.4.12 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -fpic -lpthread -I/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12/src/include/ pg_config.o -L../../../src/port -L../../../src/common -L/home/u/witi/lede/source/staging_dir/target-mipsel_24kc_musl/usr/lib -L/home/u/witi/lede/source/staging_dir/target-mipsel_24kc_musl/lib -L/home/u/witi/lede/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl/usr/lib -L/home/u/witi/lede/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl/lib -znow -zrelro -lpgcommon -lpgport -lz -lreadline -lncurses -lm -o pg_config
/home/u/witi/lede/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl/lib/gcc/mipsel-openwrt-linux-musl/5.4.0/../../../../mipsel-openwrt-linux-musl/bin/ld: pg_config.o: Relocations in generic ELF (EM: 62)
/home/u/witi/lede/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl/lib/gcc/mipsel-openwrt-linux-musl/5.4.0/../../../../mipsel-openwrt-linux-musl/bin/ld: pg_config.o: Relocations in generic ELF (EM: 62)
/home/u/witi/lede/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl/lib/gcc/mipsel-openwrt-linux-musl/5.4.0/../../../../mipsel-openwrt-linux-musl/bin/ld: pg_config.o: Relocations in generic ELF (EM: 62)
/home/u/witi/lede/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl/lib/gcc/mipsel-openwrt-linux-musl/5.4.0/../../../../mipsel-openwrt-linux-musl/bin/ld: pg_config.o: Relocations in generic ELF (EM: 62)
pg_config.o: error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status
make[7]: *** [pg_config] Error 1
make[7]: Leaving directory `/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12/src/bin/pg_config'
make[6]: *** [all-pg_config-recurse] Error 2
make[6]: Leaving directory `/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12/src/bin'
make[5]: *** [all-bin-recurse] Error 2
make[5]: Leaving directory `/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12/src'
make[4]: *** [all-src-recurse] Error 2
make[4]: Leaving directory `/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12'
make[3]: *** [/home/u/witi/lede/source/build_dir/target-mipsel_24kc_musl/postgresql-9.4.12/.built] Error 2
make[3]: Leaving directory `/home/u/witi/lede/source/feeds/packages/libs/postgresql'
make[2]: *** [package/feeds/packages/postgresql/compile] Error 2
make[2]: Leaving directory `/home/u/witi/lede/source'
make[1]: *** [/home/u/witi/lede/source/staging_dir/target-mipsel_24kc_musl/stamp/.package_compile] Error 2
make[1]: Leaving directory `/home/u/witi/lede/source'
make: *** [world] Error 2
I only using postgresql client lib in router, need by bandwidthd-pgsql, do not need postgresql server side things.
$ ./scripts/diffconfig.sh | grep pgsql
CONFIG_PACKAGE_bandwidthd-pgsql=y