I'm trying to compile a program that requires asm/errno.h header.
Building C object CMakeFiles/modem.dir/src/client.c.o
| /home/kristupas/yocto/oe-core/build/tmp-glibc/sysroots/x86_64-linux/usr/bin/arm-oe-linux-gnueabi/arm-oe-linux-gnueabi-gcc -Dmodem_EXPORTS -std=gnu99 -march=armv7-a -mfloat-abi=softfp -mfpu=neon --sysroot=/home/kristupas/yocto/oe-core/build/tmp-glibc/sysroots/mdm9607 -O2 -fexpensive-optimizations -frename-registers -fomit-frame-pointer -fPIC -I/home/kristupas/yocto/oe-core/build/tmp-glibc/work/armv7a-vfp-neon-oe-linux-gnueabi/libmodem/1.0-r0/libmodem/src -I/home/kristupas/yocto/oe-core/build/tmp-glibc/work/armv7a-vfp-neon-oe-linux-gnueabi/libmodem/1.0-r0/libmodem/include -o CMakeFiles/modem.dir/src/client.c.o -c /home/kristupas/yocto/oe-core/build/tmp-glibc/work/armv7a-vfp-neon-oe-linux-gnueabi/libmodem/1.0-r0/libmodem/src/client.c
| [ 83%] /home/kristupas/yocto/oe-core/build/tmp-glibc/work/armv7a-vfp-neon-oe-linux-gnueabi/libmodem/1.0-r0/libmodem/src/client.c:14:25: fatal error: asm/ernno.h: No such file or directory
| #include <asm/ernno.h>
^
The --sysroot argument is set correctly to my targets sysroot, but gcc still can't find the header, even though it's clearly there:
ls -la /home/kristupas/yocto/oe-core/tmp-glibc/sysroots/mdm9607/usr/include/asm/ | grep "errno\.h"
-rw-r--r-- 3 kristupas kristupas 31 Kov 9 16:06 errno.h
Doing
echo | /home/kristupas/yocto/oe-core/build/tmp-glibc/sysroots/x86_64-linux/usr/bin/arm-oe-linux-gnueabi/arm-oe-linux-gnueabi-gcc -R -Wp. -v -
returns this:
--includedir=/home/kristupas/yocto/oe-core/build/tmp-glibc/sysroots/x86_64-linux/usr/include
This is the include directory for the host, which does not contain asm/errno.h. Shouldn't it point to targets sysroot instead?
Turns out I misspelled errno and failed to notice it for hours!