Gcc compile cpp program

The errors you received are linker errors, not compiler errors. Rup says it best in his comment to another answer:. If you give the code a. So you want:. And do not even consider using an uppercase. C extension, unless you never want to port your code, and are prepared to be hated by those you work with. By default, gcc selects the language based on the file extension, but you can force gcc to select a different language backend with the -x option thus:.

More options are detailed in the gcc man page under "Options controlling the kind of output". See e. This facility is very useful in cases where gcc can't guess the language using a file extension, for example if you're generating code and feeding it to gcc via stdin.

If I recall correctly, gcc determines the filetype from the suffix. So, make it foo. And yourfilename. Now go to folder containing your. Just open it. An update with my gcc version Now if I use the extension. To use gcc cleanly, with a. Shorter if I use the. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 11 years, 6 months ago. Active 1 month ago.

Viewed k times. Try running the compilation in verbose mode -v to study the library-paths -L and libraries -l used in your system:. The settings are applicable to the selected project only. For all the GNU utilities, you can use " command --help " to list the help menu; or " man command " to display the man pages.

The utility " file " can be used to display the type of object files and executable files. A 'T' in the second column indicates a function that is defined , while a 'U' indicates a function which is undefined and should be resolved by the linker. The utility " ldd " examines an executable and displays a list of the shared libraries that it needs. The " make " utility automates the mundane aspects of building executable from source code. You can issue " make --help " to list the command-line options; or " man make " to display the man pages.

Let's begin with a simple example to build the Hello-world program hello. Create the following file named "makefile" without any file extension , which contains rules to build the executable, and save in the same directory as the source file. Use "tab" to indent the command NOT spaces. Running make without argument starts the target " all " in the makefile.

A makefile consists of a set of rules. A rule consists of 3 parts: a target, a list of pre-requisites and a command, as follows:. The target and pre-requisites are separated by a colon :. The command must be preceded by a tab NOT spaces. When make is asked to evaluate a rule, it begins by finding the files in the prerequisites.

If any of the prerequisites has an associated rule, make attempts to update those first. In the above example, the rule " all " has a pre-requisite " hello. The rule " hello. Again, it does not exist, so make looks for a rule to create it.

It runs the command " gcc -c hello. Finally, the rule " all " does nothing. More importantly, if the pre-requisite is not newer than than target, the command will not be run. In other words, the command will be run only if the target is out-dated compared with its pre-requisite. For example, if we re-run the make command:. You can also specify the target to be made in the make command.

For example, the target " clean " removes the " hello. You can then run the make without target, which is the same as " make all ". A comment begins with a and lasts till the end of the line.

The rules are usually organized in such as way the more general rules come first. The overall rule is often name " all ", which is the default target for make.

A target that does not represent a file is called a phony target. For example, the " clean " in the above example, which is just a label for a command.

If the target is a file, it will be checked against its pre-requisite for out-of-date-ness. Phony target is always out-of-date and its command will be run. The standard phony targets are: all , clean , install. Single character variables do not need the parentheses. You can also use vpath lowercase to be more precise about the file type and its search directory. Make comes with a huge set of implicit pattern rules. You can list all the rule via --print-data-base option. Make is actually quite complex, and can be considered as a programming language by itself!!

GNU Make: an automation tool for compiling and building applications. GNU Binutils: a suite of binary utility tools, including linker and assembler. GNU Bison: a parser generator similar to lex and yacc. Cygwin is huge and includes most of the Unix tools and utilities. Command: gcc -m32 geek. Well we can easily check this by the following program. Skip to content. Change Language. Related Articles. Table of Contents. Improve Article. Save Article.

Like Article. Take a step-up from those "Hello World" programs.