我想構建一個獨立版本的捲曲,對於具有非常舊的libc版本的嵌入式系統,沒有任何庫依賴性(甚至是libc)。使獨立捲曲導致段錯誤
從目前的捲曲github上,我配置編譯使用此命令:
./configure --disable-shared --enable-static-nss --prefix=/tmp/curl LDFLAGS='-static -static-libgcc -Wl,-Bstatic -lc' LIBS='-lc -lssl -lcrypto -lz -ldl'
[...]
curl version: 7.50.2-DEV
Host setup: x86_64-pc-linux-gnu
Install prefix: /tmp/curl
Compiler: gcc
SSL support: enabled (OpenSSL)
SSH support: no (--with-libssh2)
zlib support: enabled
GSS-API support: no (--with-gssapi)
TLS-SRP support: enabled
resolver: default (--enable-ares/--enable-threaded-resolver)
IPv6 support: enabled
Unix sockets support: enabled
IDN support: no (--with-{libidn,winidn})
Build libcurl: Shared=no, Static=yes
Built-in manual: enabled
--libcurl option: enabled (--disable-libcurl-option)
Verbose errors: enabled (--disable-verbose)
SSPI support: no (--enable-sspi)
ca cert bundle: /etc/ssl/certs/ca-certificates.crt
ca cert path: no
ca fallback: no
LDAP support: no (--enable-ldap/--with-ldap-lib/--with-lber-lib)
LDAPS support: no (--enable-ldaps)
RTSP support: enabled
RTMP support: no (--with-librtmp)
metalink support: no (--with-libmetalink)
PSL support: no (libpsl not found)
HTTP2 support: disabled (--with-nghttp2)
Protocols: DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS POP3 POP3S RTSP SMB SMBS SMTP SMTPS TELNET TFTP
然後在make
階段,我得到以下警告:
curl-tool_homedir.o: In function `homedir':
tool_homedir.c:(.text+0x60): warning: Using 'getpwuid' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
../lib/.libs/libcurl.a(libcurl_la-netrc.o): In function `Curl_parsenetrc':
netrc.c:(.text+0x3c3): warning: Using 'getpwuid_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
../lib/.libs/libcurl.a(libcurl_la-curl_addrinfo.o): In function `Curl_getaddrinfo_ex':
curl_addrinfo.c:(.text+0x73): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/libcrypto.a(fips.o): In function `verify_checksums':
(.text+0x4e6): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
我可以繼續執行make install
得到最終的二進制文件。
二進制無依賴性:
$ ldd /tmp/curl/bin/curl
not a dynamic executable
$ nm /tmp/curl/bin/curl | grep " U "
$
但二進制文件不工作:
$ /tmp/curl/bin/curl -version
Segmentation fault (core dumped)
你有根源問題的任何想法?
編輯1: GDB輸出:
(gdb) run
Starting program: /tmp/curl/bin/curl
Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ??()
編輯2:
$ nm /tmp/curl/bin/curl | grep getpwuid
0000000000655770 T getpwuid
00000000006558f0 T __getpwuid_r
00000000006558f0 W getpwuid_r
00000000006558f0 T __new_getpwuid_r
0000000000663cf0 T __nscd_getpwuid_r
也許問題來自W
:
W上的符號是一個弱符號塔t沒有被特別標記爲 弱對象符號。當一個弱定義的符號與一個正常定義的符號相鏈接時,使用正常定義的符號而沒有 錯誤。當一個弱的未定義符號被鏈接並且符號不是 定義時,弱符號的值變爲零,沒有錯誤。
編輯3: 如果我刪除了SSL連接,我得到了同樣的警告爲getpwuid
但二進制工作:
./configure --disable-shared --enable-static-nss --prefix=/tmp/curl LDFLAGS='-static -static-libgcc -Wl,-Bstatic,-lc'
ldd /tmp/curl/bin/curl
not a dynamic executable
/tmp/curl/bin/curl --version
curl 7.50.2-DEV (x86_64-pc-linux-gnu) libcurl/7.50.2-DEV zlib/1.2.8
Protocols: dict file ftp gopher http imap pop3 rtsp smtp telnet tftp
Features: IPv6 Largefile libz UnixSockets
nm /tmp/curl/bin/curl | grep getpwuid
00000000004f52d0 T getpwuid
00000000004f5450 T __getpwuid_r
00000000004f5450 W getpwuid_r
00000000004f5450 T __new_getpwuid_r
0000000000502cd0 T __nscd_getpwuid_r
但我需要爲HTTPS支持添加SSL這樣的問題仍然開放。
編輯4: 該問題與nss
直接相關。奇怪的是,./configure --prefix=/tmp/curl --disable-shared --enable-static-nss LDFLAGS='-static -static-libgcc -Wl,-Bstatic' LIBS='-ls'
產生一個獨立的可執行文件,但沒有SSL。 nss
問題是由於SSL鏈接。
嘗試調試它。你會知道發生了什麼。 –
嗯,我懷疑一個鏈接問題,但我怎麼能更深入的調試? – Julio
只是'gdb/tmp/curl/bin/curl'。但你可能是對的。你的系統上有多個編譯器嗎? –