![]() ![]() In the command window, type “gcc” and press enter. On my machine, the full location is C:\Program Files\CodeBlocks\MinGW\binīut it may be different on your machine if you installed Code::Blocks in a different location.Ĭlose all dialog boxes by clicking “OK” and then open a new command window, by typing “cmd” in the Windows search bar and then clicking “Command Prompt” as shown below. In the “System variables” panel (the lower half of the Environment Variables dialog box), click on “Path” to select it and then click the “Edit…” button.Ĭlick “New” to add a new item to the list and then click “Browse…” to set the new item to the “MinGW/bin” folder within your Code::Blocks installation. Type “path” in the Windows search bar as shown below and then click on “Edit the system environment variables”.Ĭlick on the “Environment Variables…” button. However, if you accidentally omit that option when installing Code::Blocks, you can update the PATH manually as follows: The installation process includes an option to update the PATH environment variable, so that gcc (or g++) can be run in a command window without needing to include the full path to the MinGW installation folder. It can be downloaded from the following page ![]() The installer I recommend for the current version of Code::Blocks is: Some versions of the Code::Blocks installer include MinGW and others don’t, so be careful to choose the right one. An easy way to install MinGW (and hence gcc / g++) on Windows is to install the Code::Blocks integrated development environement (IDE). This entry was posted in Lesson by dgookin. In next week’s Lesson, I cover how to locate and install bonus C language library files. ![]() Otherwise you’d get those ugly linker errors. That process allows the library’s functions to access their magic. ![]() The library is linked after the code is compiled. Click OK to close the Project Build Options dialog box. Click OK to add the library to the list.Ĩ. I’m a fan of direct or absolute pathnames.ħ. Select the library file and click the Open button.Ħ. On the Mac, the math library is named libm.tbd.ĥ. If you were linking in the math library - which isn’t necessary on a PC, but doing so doesn’t screw up anything - you would locate the file named libm.a, which is the way MinGW names its libraries. In Linux, and other Unices, the traditional location for C libraries is /usr/lib.Platforms/atform/Developer/SDKs/MacOSX.sdk/usr/lib. In the current version, C language libraries are kept in /Applications/Xcode.app/Contents/Developer/. With XCode on the Mac, the library locations differ depending on the version of XCode.If the library was saved elsewhere, you must browse to that specific directory (“folder”). For the MinGW compiler, the location for standard libraries is MinGW\lib, with the full path: C:\Program Files (x86)\CodeBlocks\MingGW\lib\ for a standard Code::Blocks installation.Use the Choose Library to Link dialog box to find the library’s location on your computer’s mass storage system: In Add Library dialog box, click the Ellipsis (…) button to browse to the location of the library file. The Project Build Options dialog box appears.Ĥ. Some huge projects require multiple libraries.Īfter creating the Code::Blocks project, follow these steps to add a library: And you can follow the steps to link in any library, not just the math library. You don’t have to on a Mac or PC, but these are the steps you would use. In Code::Blocks, things work differently.Īs an example, suppose you need to link in the math library in a Code::Blocks project. On the command line, you use the -l x switch to link in library x. The library is what contains the code that makes the functions work. The header file, however, is not the same as the library. The library also comes with a header file that provides function definitions, constants, structures, and other whatnot. You must specify that such a library is linked into the final program. The standard library is linked by default, but pretend that you’re using a library that creates graphics, sound, or provides other specific functions beyond the normal scope of C. More importantly, to expand the C language’s capabilities, you frequently need to mix in another library. I’ve not installed Code::Blocks on a Linux computer, but for a moment I’ll pretend that such an installation has the same issue I described in last week’s Lesson: You must manually link in the C language math library to create any program that uses a math.h function. ![]()
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