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Required changes: * Add qualifying '.' to scripts or to @INC, as appropriate since we're enabling default_inc_excludes_dot; * Add new platform/library definitions like double-double format and locale library functions/headers; * Delete patch 020 as it's been upstreamed; Optional changes: * Instead of using -@rm and having that fail, emit an error message, and be ignored, just use @rm -f instead which will always succeed. Security [CVE-2017-12837] Heap buffer overflow in regular expression compiler Compiling certain regular expression patterns with the case-insensitive modifier could cause a heap buffer overflow and crash perl. This has now been fixed. [perl #131582] [CVE-2017-12883] Buffer over-read in regular expression parser For certain types of syntax error in a regular expression pattern, the error message could either contain the contents of a random, possibly large, chunk of memory, or could crash perl. This has now been fixed. [perl #131598] [CVE-2017-12814] $ENV{$key} stack buffer overflow on Windows A possible stack buffer overflow in the %ENV code on Windows has been fixed by removing the buffer completely since it was superfluous anyway. [perl #131665] Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
-- Perl configuration --
Perl uses a huge configuration file, normally generated via the Configure script
at build-time. This fails when cross-compiling though, so we need to supply our
own.
We're using perlconfig.pl to piece together the final configuration from a bunch
of configuration files(all ending in .config). Please refer to perlconfig.pl's
POD for information on usage and syntax.
Throughout the files, you will see a bunch of references to private symbols with
the prefix "owrt". These are used to control output in an effort to both
simplify writing configuration files, as well as to provide switchable options
to select the feature set of the resulting perl installation.
The following will be a summary/quick reference of all private symbols we're
currently using:
Passed via architecture configuration file(mipsel.config, i486.config, ...)
---------------------------------------------------------------------------
Symbol Values Description
owrt:bits 32/64 Target's native word length.
owrt:endian little/big Target's endianness.
owrt:arch mipsel, i486, ... Target's architecture name.
owrt:sig_count 64/128 Number of signals the target
provides(NSIG - 1).
owrt:sigs * Symbolic names of the first 32 signals
this architecture provides, in numeric
order. Separated by whitespaces.
owrt:sig_name_extra * Symbolic names of any additional signals
this architecture provides after
owrt:sig_count. Separated by
whitespaces.
owrt:sig_num_extra * Numeric values associated with the
signal names provided in
owrt:sig_name_extra. Separated by
whitespaces.
Passed via command line
-----------------------
Symbol Values Description
owrt:libc glibc/uclibc/musl Which C library implementation is in
use.
owrt:threads yes/no Whether to enable threading support.
owrt:ipv6 define/undef Whether to enable IPv6 support.
owrt:target_cross * Target architecture's host triplet.
owrt:target_cc * C compiler to use.
owrt:gccversion * target_cc's version number.
owrt:cflags * Additional C compiler flags.
owrt:ldflags * Additional linker flags.
owrt:staging_dir * Same as OpenWRT buildroot's
$(STAGING_DIR).
owrt:host_perl_prefix * host-perl installation prefix.
Passed via version.config
-------------------------
Symbol Values Description
owrt:perllibpath * Path to perl library files, from the
target's point of view.