How to check if gcc has failed, returned a warning, or succeeded in Bash? How to check if gcc has failed, returned a warning, or succeeded in Bash? bash bash

How to check if gcc has failed, returned a warning, or succeeded in Bash?


bash gcc

Your condition should be:

if [ $? -ne 0 ]

GCC will return zero on success, or something else on failure. That line says "if the last command returned something other than zero."

bash gcc 

if gcc helloworld.c -o helloworld; then echo "Success!";else echo "Failure"; fi

You want bash to test the return code, not the output. Your code captures stdout, but ignores the value returned by GCC (ie the value returned by main()).

bash gcc

To tell the difference between compiling completely cleanly and compiling with errors, first compile normally and test $?. If non-zero, compiling failed. Next, compile with the -Werror (warnings are treated as errors) option. Test $? - if 0, it compiled without warnings. If non-zero, it compiled with warnings.

Ex:

gcc -Wall -o foo foo.cif [ $? -ne 0 ]then    echo "Compile failed!"    exit 1figcc -Wall -Werror -o foo foo.cif [ $? -ne 0 ]then    echo "Compile succeeded, but with warnings"    exit 2else    echo "Compile succeeded without warnings"fi

Recent Posts
How can I color dots in a xy scatterplot according to column value?
How to update a claim in ASP.NET Identity?
What does {0} mean when initializing an object?
Accessing members of items in a JSONArray with Java
How to log SQL statements in Spring Boot?
Powershell Get-WebSite name parameter is ignored
How to detect scroll to bottom of html element
Java synchronized method
How to test controllers with CodeIgniter?
Detect Visual Composer
Matplotlib: Specify format of floats for tick labels
Rails join a list of strings with commas and "and" before the last