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toolchain: add option to copy the gconv libraries

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The gconv libraries are used to translate between different character sets
('charsets', even 'csets' sometimes). Some packages need them to present
text to the user (eg. XBMC Gotham).

In (e)glibc they are implemented by the internal implemenation of iconv,
called gconv, and are provided as dlopen-able libraries.

Note that some gconv modules need extra libraries (shared by more than
one gconv module), so we must, when adding a subset of modules, scan the
installed modules in search of the missing libraries.

[Thomas: add general explanation in expunge-gconv-modules and fix
coding style.]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Cc: Eric Limpens <limpens@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2014-07-27 21:28:32 +02:00 committed by Thomas Petazzoni
parent 24a9da81df
commit 11c1076db9
4 changed files with 118 additions and 1 deletions
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2
Makefile
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@ -369,7 +369,7 @@ include support/dependencies/dependencies.mk
# We also need the various per-package makefiles, which also add
# each selected package to TARGETS if that package was selected
# in the .config file.
include toolchain/helpers.mk
include toolchain/*.mk
include toolchain/*/*.mk
# Include the package override file if one has been provided in the

59
support/scripts/expunge-gconv-modules Executable file
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@ -0,0 +1,59 @@
#!/bin/bash
# This script is used to generate a gconv-modules file that takes into
# account only the gconv modules installed by Buildroot. It receives
# on its standard input the original complete gconv-modules file from
# the toolchain, and as arguments the list of gconv modules that were
# actually installed, and writes on its standard output the new
# gconv-modules file.
# The format of gconv-modules is precisely documented in the
# file itself. It consists of two different directives:
# module FROMSET TOSET FILENAME COST
# alias ALIAS REALNAME
# and that's what this script parses and generates.
#
# There are two kinds of 'module' directives:
# - the first defines conversion of a charset to/from INTERNAL representation
# - the second defines conversion of a charset to/from another charset
# we handle each with slightly different code, since the second never has
# associated aliases.
gawk -v files="${1}" '
$1 == "alias" {
aliases[$3] = aliases[$3] " " $2;
}
$1 == "module" && $2 != "INTERNAL" && $3 == "INTERNAL" {
file2internals[$4] = file2internals[$4] " " $2;
mod2cost[$2] = $5;
}
$1 == "module" && $2 != "INTERNAL" && $3 != "INTERNAL" {
file2cset[$4] = file2cset[$4] " " $2 ":" $3;
mod2cost[$2] = $5;
}
END {
nb_files = split(files, all_files);
for(f = 1; f <= nb_files; f++) {
file = all_files[f];
printf("# Modules and aliases for: %s\n", file);
nb_mods = split(file2internals[file], mods);
for(i = 1; i <= nb_mods; i++) {
nb_aliases = split(aliases[mods[i]], mod_aliases);
for(j = 1; j <= nb_aliases; j++) {
printf("alias\t%s\t%s\n", mod_aliases[j], mods[i]);
}
printf("module\t%s\t%s\t%s\t%d\n", mods[i], "INTERNAL", file, mod2cost[mods[i]]);
printf("module\t%s\t%s\t%s\t%d\n", "INTERNAL", mods[i], file, mod2cost[mods[i]]);
printf("\n" );
}
printf("%s", nb_mods != 0 ? "\n" : "");
nb_csets = split(file2cset[file], csets);
for(i = 1; i <= nb_csets; i++) {
split(csets[i], cs, ":");
printf("module\t%s\t%s\t%s\t%d\n", cs[1], cs[2], file, mod2cost[cs[1]]);
}
printf("%s", nb_csets != 0 ? "\n\n" : "");
}
}
'

22
toolchain/toolchain-common.in
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@ -77,6 +77,28 @@ config BR2_GENERATE_LOCALE
specified, UTF-8 is assumed. Examples of locales: en_US,
fr_FR.UTF-8.
config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
bool "Copy gconv libraries"
depends on BR2_TOOLCHAIN_USES_GLIBC
help
The gconv libraries are used to convert between different
character sets (charsets).
Say 'y' if you need to store and/or display different charsets.
config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_LIST
string "Gconv libraries to copy"
depends on BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
help
Set to the list of gconv libraries to copy.
Leave empty to copy all gconv libraries.
Specify only the basename of the libraries, leave
out the .so extension. Eg.:
IBM850 ISO8859-15 UNICODE
Note: the full set of gconv libs are ~8MiB (on ARM).
# glibc and eglibc directly include gettext, so a separatly compiled
# gettext isn't needed and shouldn't be built to avoid conflicts. Some
# packages always need gettext, other packages only need gettext when

36
toolchain/toolchain.mk Normal file
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@ -0,0 +1,36 @@
# This file contains toolchain-related customisation of the content
# of the target/ directory. Those customisations are added to the
# TARGET_FINALIZE_HOOKS, to be applied just after all packages
# have been built.
# Install the gconv modules
ifeq ($(BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY),y)
GCONV_LIBS = $(call qstrip,$(BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_LIST))
define COPY_GCONV_LIBS
$(Q)if [ -z "$(GCONV_LIBS)" ]; then \
$(INSTALL) -m 0644 -D $(STAGING_DIR)/usr/lib/gconv/gconv-modules \
$(TARGET_DIR)/usr/lib/gconv/gconv-modules; \
$(INSTALL) -m 0644 $(STAGING_DIR)/usr/lib/gconv/*.so \
$(TARGET_DIR)/usr/lib/gconv \
|| exit 1; \
else \
for l in $(GCONV_LIBS); do \
$(INSTALL) -m 0644 -D $(STAGING_DIR)/usr/lib/gconv/$${l}.so \
$(TARGET_DIR)/usr/lib/gconv/$${l}.so \
|| exit 1; \
$(TARGET_READELF) -d $(STAGING_DIR)/usr/lib/gconv/$${l}.so |\
sort -u |\
sed -e '/.*(NEEDED).*\[\(.*\.so\)\]$$/!d; s//\1/;' |\
while read lib; do \
$(INSTALL) -m 0644 -D $(STAGING_DIR)/usr/lib/gconv/$${lib} \
$(TARGET_DIR)/usr/lib/gconv/$${lib} \
|| exit 1; \
done; \
done; \
./support/scripts/expunge-gconv-modules "$(GCONV_LIBS)" \
<$(STAGING_DIR)/usr/lib/gconv/gconv-modules \
>$(TARGET_DIR)/usr/lib/gconv/gconv-modules; \
fi
endef
TARGET_FINALIZE_HOOKS += COPY_GCONV_LIBS
endif