[oe-commits] [openembedded-core] 01/13: curl: enable threaded resolver

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rpurdie pushed a commit to branch master
in repository openembedded-core.

commit 41f1e44fce976c4140cda62a41349e91e69d04ef
Author: André Draszik <adraszik at tycoint.com>
AuthorDate: Mon Sep 4 10:42:44 2017 +0100

    curl: enable threaded resolver
    
    Multi-threaded applications using libcurl crash
    on DNS timeouts when built using OE.
    
    The reason is as follows:
    By default, libcurl implements DNS timeouts using a
    timer (alarm()) and a pair of setjmp()/longjmp().
    This approach is unsafe in multi-threaded applications
    for various reasons, as e.g. explained in the relevant
    man-pages.
    
    To avoid this, libcurl can be compiled with a built-in
    threaded resolver, or against the c-ares asynchronous
    resolver library.
    
    To keep extra dependencies to a minimum, and to mimic
    other distributions (debian at least), and because
    c-ares is not available in OE-core, add a PACKAGECONFIG
    to be able to enable use of of the built-in threaded
    resolver and enable it by default.
    
    Signed-off-by: André Draszik <adraszik at tycoint.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/recipes-support/curl/curl_7.54.1.bb | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/meta/recipes-support/curl/curl_7.54.1.bb b/meta/recipes-support/curl/curl_7.54.1.bb
index f42582a..5c8072f 100644
--- a/meta/recipes-support/curl/curl_7.54.1.bb
+++ b/meta/recipes-support/curl/curl_7.54.1.bb
@@ -20,9 +20,9 @@ SRC_URI[sha256sum] = "fdfc4df2d001ee0c44ec071186e770046249263c491fcae48df0e1a3ca
 CVE_PRODUCT = "libcurl"
 inherit autotools pkgconfig binconfig multilib_header
 
-PACKAGECONFIG ??= "${@bb.utils.filter('DISTRO_FEATURES', 'ipv6', d)} gnutls proxy zlib"
-PACKAGECONFIG_class-native = "ipv6 proxy ssl zlib"
-PACKAGECONFIG_class-nativesdk = "ipv6 proxy ssl zlib"
+PACKAGECONFIG ??= "${@bb.utils.filter('DISTRO_FEATURES', 'ipv6', d)} gnutls proxy threaded-resolver zlib"
+PACKAGECONFIG_class-native = "ipv6 proxy ssl threaded-resolver zlib"
+PACKAGECONFIG_class-nativesdk = "ipv6 proxy ssl threaded-resolver zlib"
 
 PACKAGECONFIG[dict] = "--enable-dict,--disable-dict,"
 PACKAGECONFIG[gnutls] = "--with-gnutls,--without-gnutls,gnutls"
@@ -42,6 +42,7 @@ PACKAGECONFIG[smtp] = "--enable-smtp,--disable-smtp,"
 PACKAGECONFIG[ssl] = "--with-ssl --with-random=/dev/urandom,--without-ssl,openssl"
 PACKAGECONFIG[telnet] = "--enable-telnet,--disable-telnet,"
 PACKAGECONFIG[tftp] = "--enable-tftp,--disable-tftp,"
+PACKAGECONFIG[threaded-resolver] = "--enable-threaded-resolver,--disable-threaded-resolver"
 PACKAGECONFIG[zlib] = "--with-zlib=${STAGING_LIBDIR}/../,--without-zlib,zlib"
 PACKAGECONFIG[krb5] = "--with-gssapi,--without-gssapi,krb5"
 

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