Libav is quite portable and builds and work in most operating systems and architectures.
General Requirements
Libav needs a working C99 compiler, gnu make and a posix shell in order to build, on x86 platforms is advised to install yasm in order to build cpu-specific optimizations.
Platforms Specific Instructions
Supporting a new platform
The Libav configure system is quite easy to extend.
The configure script is written in posix sh, please avoid bashisms.
In general should be enough to add a specific section in the target_os case block.
# OS specific
case $target_os in
aix)
SHFLAGS=-shared
add_cppflags '-I\$(SRC_PATH)/compat/aix'
enabled shared && add_ldflags -Wl,-brtl
;;
haiku)
prefix_default="/boot/common"
network_extralibs="-lnetwork"
host_libs=
;;
sunos)
SHFLAGS='-shared -Wl,-h,$$(@F)'
enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
network_extralibs="-lsocket -lnsl"
# When using suncc to build, the Solaris linker will mark
# an executable with each instruction set encountered by
# the Solaris assembler. As our libraries contain their own
# guards for processor-specific code, instead suppress
# generation of the HWCAPS ELF section on Solaris x86 only.
enabled_all suncc x86 &&
echo "hwcap_1 = OVERRIDE;" > mapfile &&
add_ldflags -Wl,-M,mapfile
nm_default='nm -P -g'
;;
...
The entries are alphabetically sorted.
Cpu specific details can be put in the arch case block
case "$arch" in
aarch64|alpha|ia64)
spic=$shared
;;
mips)
check_64bit mips mips64 '_MIPS_SIM > 1'
spic=$shared
;;
parisc)
check_64bit parisc parisc64 'sizeof(void *) > 4'
spic=$shared
;;
ppc)
check_64bit ppc ppc64 'sizeof(void *) > 4'
spic=$shared
;;
If your native compiler requires additional specific flags there is a section for it as well.