Makefile C/C++ with function depending of environment - c++

Question

I am struggling with the following problem :
I would like to use tput in my Makefile for color but it needs the environment variable $TERM ( and the echo alternative with \033[0;31m is not portable and will no behave the same way on all computers ).
When on an environment that does not have the variable, make fails and the program is not compiled.
I already tried searching for environment variable testing in a Makefile but with no success so far.
This is an example of what I would like to do :
define my_color
#tput setaf $2
#tput bold
#echo $1
#tput sgr0
endef
CC = gcc
CFLAGS = -Wall -Wextra
SRCS = my_super_file.c
OBJS = $(SRCS:.c=.o)
NAME = super_programm
all: $(NAME)
$(NAME): $(OBJS)
$(call my_color, " Compiling $<", 2)
$(CC) -o $(NAME) $(OBJS)
clean:
rm -rf $(OBJS)
fclean: clean
rm -rf $(NAME)
re: fclean all
.PHONY: all re clean fclean
a more complete example here : https://github.com/Hellfire01/Makefile/blob/master/Makefile
both will work just fine any computer but not on my server
What I am trying to do is have only one Makefile capable of working on both my computer and my server, I tried looking at the function ifeq but I did not succeed in getting it to work.
Any help will be greatly appreciated thank you for reading.

Answer 1

I think this makefile illustrates what you want:
have_term := $(shell echo $$TERM)
ifdef have_term
define my_color =
#tput setaf $2
#tput bold
#echo $1
#tput sgr0
endef
else
my_color = #echo $1
endif
all:
$(call my_color, "Hello world", 2)
If TERM is defined in the environment then make prints Hello World in
green, otherwise in plain white.
See 7.2 Syntax of Conditionals

Answer 2

Assuming the issue here is just that you want make to ignore errors/failures from tput when it can't operate correctly and continue you can do that by sticking a leading - on the tput lines (the same as the leading #).
So either #-tput ... or -#tput ....
This will cause make to see (and output) the errors but won't fail the target because of them.
From Errors in the GNU Make Manual:
To ignore errors in a recipe line, write a ‘-’ at the beginning of the line’s text (after the initial tab). The ‘-’ is discarded before the line is passed to the shell for execution.
For example,
clean:
-rm -f *.o

Answer 3

#- won't work, you'll get lots of error messages.
Something like this would work, but you could defintely write this more elegantly.
have_term := $(TERM)
ifeq ($(TERM),dumb)
have_term=
endif
ifdef have_term
color_blue = #tput setaf 6
color_end = #tput sgr0
else
color_blue =
color_end =
endif