Translations:Handbook:Parts/Portage/Variables/8/en

When Portage builds applications, it passes the contents of the following variables to the compiler and configure script:
 * CFLAGS & CXXFLAGS define the desired compiler flags for C and C++ compiling.
 * CHOST defines the build host information for the application's configure script
 * MAKEOPTS is passed to the make command and is usually set to define the amount of parallelism used during the compilation. More information about the make options can be found in the make man page.