My Code Complains of bcm2835 undefined

[Israel Etu]

Hello Colleagues,

I wrote a code on Raspberry Pi zero, including the bcm2835.h. It is just a smple code needed to toggle a LED. However, the code would not compile at all. It complains that bcm2835 is not defined thus: "/usr/bin/ld: blinky.c:(.text+0x34): undefined referenc to bcm2835_gpio_fsel".

I have downloaded bcm2835-1.73 and installed using super user privilege, yet it's failing to compile.

Can someone please help me with advice?

Thank you very much in advance.

Israel

[Sean ONeill]

Hi

How are you compiling the code?

You need to include linker flag   '-lbcm2835'

[Israel Etu]

Thank you.

I included the flag and it worked. Another thing was that I was initially compiling it right on the code editor. But now I used the terminal and put 'sudo' before the 'gcc' command and it worked.

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