Inter-file optimization program generation method, and program generator

A non-transitory, computer-readable recording medium having stored therein a program for causing a computer to execute a process, the process comprising:

• identifying, from command data including a plurality of commands to generate an executable program, a first object file that is an object file in a link command to which an option to perform link-time optimization is appended;
• storing identification information of the first object file in a storage, when an input file is the first object file and the option is appended to each of one or more link commands included in the command data;
• generating a second object file from a second source file other than a first source file corresponding to the first object file stored in the storage;
• causing a compiler to perform a process to generate the first object file and a third object file from an intermediate file generated through inter-file optimization on the first source file and the second source file;
• causing a linker to perform a process to link the first object file and the third object file;
• and
• execute the compiler to perform a process to perform inter-file optimization on the first source file to generate a first intermediate file and generate the first object file from the generated first intermediate file during first compilation,
• when a number of times of inter-file optimization to be performed on the first source file corresponding to the first object file is a predetermined number and when inter-file optimization is not yet performed on the first source file,
• wherein compilation of the first source file before the process of the inter-file optimization is omitted.

A program generation method executed by a computer, the method comprising:

• identifying, an object file in a link command to which an option to perform link-time optimization is appended, from command data including a plurality of commands to generate an executable program;
• storing identification information of the object file in a storage where an input file is the object file and the option is appended to at least one of link commands included in the command data;
• and
• execute a compiler to perform a process to perform inter-file optimization on a source file to generate an intermediate file and generate an object file from the generated intermediate file during compilation, when a number of times of inter-file optimization to be performed on the source file corresponding to the object file is a predetermined number and when inter-file optimization is not yet performed on the source file,
• wherein a compilation before the link-time optimization is performed is omitted according to the identification information of the object file stored.