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bug#25350: Automake does not override CC.
From: |
Mathieu Lirzin |
Subject: |
bug#25350: Automake does not override CC. |
Date: |
Sun, 18 Jun 2017 02:03:03 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) |
tags 25350 notabug
close 25350
thanks
Hello William,
"william estrada" <address@hidden> writes:
> I have a Makefile.am that creates a Makefile that does 3 compiles, one for
> each target CPU.
> # src/event/Makefile.am
> AM_LDLAGS = --Pedantic -Wall -Std=C99 -O2
> bin_PROGRAMS =
> include x64.am
> include arm.am
> include i686.am
> ---------------------------------------
> # src/event/x64.am
> bin_PROGRAMS += event_x64
> event_x64_SOURCES = event.c
> event_x64_CFLAGS = -m64
> ---------------------------------------
> # src/event/i686.am
> bin_PROGRAMS += event_i686
> event_i686_SOURCES = event.c
> event_i686_CFLAGS = -m32
> ---------------------------------------
> # src/event/arm.am
> bin_PROGRAMS += event_arm
> event_arm_SOURCES = event.c
> event_arm_CFLAGS = -DARM
> event_arm_CC = arm-linux-gnu-gcc
> AM_CC = arm-linux-gnu-gcc
>
> My problem is my gcc on my Fedora 23 does not support the '-marm', so I
> need to change the CC flag.
> Using event_arm_CC or AM_CC does not work.
>
> How to change the compiler?
I don't any experience with cross compilation, but AIUI what you try
to achieve doesn't fit in the Autotools model.
What you have to do is to provide a generic build instruction:
--8<---------------cut here---------------start------------->8---
bin_PROGRAMS = event
event_SOURCES = event.c
--8<---------------cut here---------------end--------------->8---
Then when running './configure' you have to define the "--build",
"--host", and "--target" options according to the architecture you want
compile [1][2]. If you want to automate this process for multiple
architectures, you have to create a script running './configure ... &&
make' multiples times
I am closing this bug. If you have questions regarding cross
compilation with Automake feel free to ask them on <address@hidden>.
Thanks.
--
Mathieu Lirzin
GPG: F2A3 8D7E EB2B 6640 5761 070D 0ADE E100 9460 4D37
[1]
https://www.gnu.org/software/automake/manual/automake.html#Cross_002dCompilation
[2] https://www.gnu.org/software/autoconf/manual/autoconf.html#Specifying-Names
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