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Building programs
Building compatible C programs
The compat series of packages essentially provide a cross compiling
environment. To use the system you will need the following packages:
compat-binutils-5.2
compat-egcs-5.2
compat-glibc-5.2
compat-libs-5.2
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To build a binary using the system, you will use
i386-glibc20-linux-gcc instead of
gcc as the compiler.
[msw@rhl60 msw]$ i386-glibc20-linux-gcc -o hello hello.c
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This new binary can be transferred to a Red Hat Linux 5.2 box and it
will successfully execute:
[msw@rhl52 msw]$ ./hello
Hello, world!
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In most cases entire applications can be rebuilt by editing a
toplevel Makefile to use the correct
gcc. Applications which use the
autoconf system for configuration are
usually easy to cross compile. To do this run configure like this:
env PATH=/usr/i386-glibc20-linux/bin;$PATH \
CC=i386-glibc20-linux-gcc ./configure
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Once the package has been configured, running
make will build binaries compatible with
glibc 2.0.
Building compatible C++ programs
C++ programs can also be built for 5.2 applications using this
system. To build C++ programs the compat-egcs-c++-5.2
package must be installed in addition to the
packages needed for C compiling.
Building C++ programs using the compatibility environment requires
a little more work than building C programs. This is because you
must provide the include path for the C++ headers to the compiler.
Invoke the compatibility C++ compiler with:
env PATH="/usr/i386-glibc20-linux/bin;$PATH" \
i386-glibc20-linux-c++ -I /usr/i386-glibc20-linux/include/g++
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You can provide the header include path to autoconf based packages
by running configure with a few environment variables set:
env PATH=/usr/i386-glibc20-linux/bin;$PATH \
CXX=i386-glibc20-linux-c++ \
CXXFLAGS=-I/usr/i386-glibc20-linux/include/g++ ./configure
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