6.2. M4-1.4.21

#### Linux From Scratch - Version 13.1-systemd

### Chapter 6. Cross Compiling Temporary Tools

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# 6.2 M4-1.4.21

The M4 package contains a macro processor.

Approximate build time: 0.1 SBU
Required disk space: 39 MB

## 6.2.1 Installation of M4

Ensure packages that use gnulib detect some newer functions found in glibc-2.44.

    cat > $LFS/usr/share/config.site << EOF
    ac_cv_func_posix_spawn_file_actions_addchdir=yes
    ac_cv_func_posix_spawn_file_actions_addfchdir=yes
    EOF

Prepare M4 for compilation:

    ./configure --prefix=/usr   \
                --host=$LFS_TGT \
                --build=$(build-aux/config.guess)

Compile the package:

    make

Install the package:

    make DESTDIR=$LFS install

Details on this package are located in Section 8.14.2, “Contents of M4.”

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