docker pull elonh/opde:sdk
docker run -it --rm elonh/opde:sdk zsh # or bash
export http_proxy= # [your proxy], do not use localhost or 127.0.0.1
export https_proxy=$http_proxy
opde feeds && opde config -a
make package/feeds/packages/i2c-tools/compile -j$(nproc) || make package/feeds/packages/i2c-tools/compile V=s

make[4]: Entering directory '/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2'
ccache_cc -fpic -D_REENTRANT -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c lib/smbus.c -o lib/smbus.o
ccache_cc -shared -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/lib -znow -zrelro -Wl,--version-script=lib/libi2c.map -Wl,-soname,libi2c.so.0 -o lib/libi2c.so.0.1.1 lib/smbus.o -lc
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c lib/smbus.c -o lib/smbus.ao
rm -f lib/libi2c.a
ar rcvs lib/libi2c.a lib/smbus.ao
a - lib/smbus.ao
rm -f lib/libi2c.so.0
ln -sf libi2c.so.0.1.1 lib/libi2c.so.0
rm -f lib/libi2c.so
ln -sf libi2c.so.0.1.1 lib/libi2c.so
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/i2cdetect.c -o tools/i2cdetect.o
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/i2cbusses.c -o tools/i2cbusses.o
ccache_cc -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/lib -znow -zrelro -o tools/i2cdetect tools/i2cdetect.o tools/i2cbusses.o lib/libi2c.so -Llib -li2c
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/i2cdump.c -o tools/i2cdump.o
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/util.c -o tools/util.o
ccache_cc -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/lib -znow -zrelro -o tools/i2cdump tools/i2cdump.o tools/i2cbusses.o tools/util.o lib/libi2c.so -Llib -li2c
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/i2cset.c -o tools/i2cset.o
ccache_cc -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/lib -znow -zrelro -o tools/i2cset tools/i2cset.o tools/i2cbusses.o tools/util.o lib/libi2c.so -Llib -li2c
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/i2cget.c -o tools/i2cget.o
ccache_cc -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/lib -znow -zrelro -o tools/i2cget tools/i2cget.o tools/i2cbusses.o tools/util.o lib/libi2c.so -Llib -li2c
ccache_cc -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wnested-externs -Winline -W -Wundef -Wmissing-prototypes -Iinclude -c tools/i2ctransfer.c -o tools/i2ctransfer.o
ccache_cc -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/lib -znow -zrelro -o tools/i2ctransfer tools/i2ctransfer.o tools/i2cbusses.o tools/util.o lib/libi2c.so -Llib -li2c
make[4]: Leaving directory '/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2'
running install
running build
running build_ext
building 'smbus' extension
creating build
creating build/temp.-3.9
ccache_cc -Wno-unused-result -Wsign-compare -DNDEBUG -g -O3 -Wall -O2 -I/openwrt/staging_dir/host/include -I/openwrt/staging_dir/hostpkg/include -I/openwrt/staging_dir/target-mips_24kc_musl/host/include -O2 -I/openwrt/staging_dir/host/include -I/openwrt/staging_dir/hostpkg/include -I/openwrt/staging_dir/target-mips_24kc_musl/host/include -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 -mips16 -minterlink-mips16 -fmacro-prefix-map=/openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2=i2c-tools-4.2 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -I/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/usr/include -I/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/include/fortify -I/openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/include -I/openwrt/staging_dir/target-mips_24kc_musl/usr/include/python3.9 -fPIC -I/openwrt/staging_dir/target-mips_24kc_musl/usr/include/python3.9 -c smbusmodule.c -o build/temp.-3.9/smbusmodule.o -I../include
smbusmodule.c:20:10: fatal error: Python.h: No such file or directory
 #include <Python.h>
          ^~~~~~~~~~
compilation terminated.
error: command '/openwrt/staging_dir/host/bin/ccache_cc' failed with exit code 1
make[3]: *** [Makefile:109: /openwrt/build_dir/target-mips_24kc_musl/i2c-tools-4.2/.built] Error 1