error: implicit declaration of function ‘fsync’ [-Werror=implicit-function-declaration]

Question

error: implicit declaration of function ‘fsync’ [-Werror=implicit-function-declaration]

leonstafford opened this issue 7 years ago · comments

failing to build on *buntu 12

c99 -Wall -pedantic -Werror -D _DEFAULT_SOURCE -c src/xorg.c
c99 -Wall -pedantic -Werror -D _DEFAULT_SOURCE -c src/console.c
c99 -Wall -pedantic -Werror -D _DEFAULT_SOURCE -c src/thinkpad.c
src/thinkpad.c: In function ‘thinkpad_turn_on’:
src/thinkpad.c:86:2: error: implicit declaration of function ‘fsync’ [-Werror=implicit-function-declaration]
cc1: all warnings being treated as errors
make: *** [thinkpad.o] Error 1

Mladen Mijatov · Answer 1 · Mon Jan 23 2017 19:13:10 GMT+0800 (China Standard Time)

I'll check. Thanks for reporting.

Mladen Mijatov · Answer 2 · Sat Jan 06 2018 19:30:25 GMT+0800 (China Standard Time)

fsync function was added in glibc version 2.8. Try changing it to fdatasync and see if you can build. Also, sorry for the late reply. Am long overdue on my projects.

Mladen Mijatov · Answer 3 · Sat Jan 06 2018 21:55:19 GMT+0800 (China Standard Time)

Just pushed version which allows you to specify with which provider program is to be built. This will allow you to go around this issue if you don't need ThinkPad support.