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SUSE Linux Enterprise Desktop Deployment Guide
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15.3 Software Compilation on Biarch Platforms

To develop binaries for the other architecture on a biarch architecture, the respective libraries for the second architecture must additionally be installed. These packages are called rpmname-32bit. You also need the respective headers and libraries from the rpmname-devel packages and the development libraries for the second architecture from rpmname-devel-32bit.

Most open source programs use an autoconf-based program configuration. To use autoconf for configuring a program for the second architecture, overwrite the normal compiler and linker settings of autoconf by running the configure script with additional environment variables.

The following example refers to an x86_64 system with x86 as the second architecture.

  1. Use the 32-bit compiler:

    CC="gcc -m32"
  2. Instruct the linker to process 32-bit objects (always use gcc as the linker front-end):

    LD="gcc -m32"
  3. Set the assembler to generate 32-bit objects:

    AS="gcc -c -m32"
  4. Determine that the libraries for libtool and so on come from /usr/lib:

    LDFLAGS="-L/usr/lib"
  5. Determine that the libraries are stored in the lib subdirectory:

    --libdir=/usr/lib
  6. Determine that the 32-bit X libraries are used:

    --x-libraries=/usr/X11R6/lib/

Not all of these variables are needed for every program. Adapt them to the respective program.

CC="gcc -m32"            \
LDFLAGS="-L/usr/lib;"  \
        .configure       \
          --prefix=/usr  \
          --libdir=/usr/lib
make
make install        
SUSE Linux Enterprise Desktop Deployment Guide
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