Qt linking to icu: confusion between system-wide installed one and Qt provided one

[nbigaouette]

Arch Linux provides Qt 5.7 and icu, installed system-wide:

$ ldd /usr/lib/libQt5Core.so.5.7.0
    [...]
    libicui18n.so.57 => /usr/lib/libicui18n.so.57 (0x00007ff249892000)
    libicuuc.so.57 => /usr/lib/libicuuc.so.57 (0x00007ff2494ea000)
    libicudata.so.57 => /usr/lib/libicudata.so.57 (0x00007ff2464a8000)
    [...]
$ pacman -Qo /usr/lib/libQt5Core.so.5.7.0
/usr/lib/libQt5Core.so.5.7.0 is owned by qt5-base 5.7.0-1
$ pacman -Qo /usr/lib/libicuuc.so.57
/usr/lib/libicuuc.so.57 is owned by icu 57.1-1

Installing Qt from the installer (qt-unified-linux-x64-2.0.3-1-online.run) will also install its own version:

ldd ~/Qt/5.7/gcc_64/lib/libQt5Core.so.5.7.0
    [...]
    libicui18n.so.56 => ${HOME}/Qt/5.7/gcc_64/lib/libicui18n.so.56 (0x00007f53cb34c000)
    libicuuc.so.56 => ${HOME}/Qt/5.7/gcc_64/lib/libicuuc.so.56 (0x00007f53caf94000)
    libicudata.so.56 => ${HOME}/Qt/5.7/gcc_64/lib/libicudata.so.56 (0x00007f53c95b1000)
    [...]

But compiling using Qt from the installer (QT_DIR=${HOME}/Qt/5.7/gcc_64) fails to link:

cargo build --verbose --example hello_world
       Fresh libc v0.2.13
   Compiling libqmlbind-sys v0.0.2 (file://${HOME}/qmlrsng.git/libqmlbind-sys)
     Running `rustc examples/hello_world.rs --crate-name hello_world --crate-type bin -g --out-dir ${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/examples --emit=dep-info,link -L dependency=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug -L dependency=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/deps --extern libc=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/deps/liblibc-30d46fdd62f8c2eb.rlib --extern libqmlbind_sys=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/liblibqmlbind_sys.rlib -L libqmlbind/qmlbind -L ${HOME}/Qt/5.7/gcc_64/lib`
examples/hello_world.rs:33:13: 33:22 warning: unused variable: `exit_code`, #[warn(unused_variables)] on by default
examples/hello_world.rs:33         let exit_code = ffi::qmlbind_application_exec(app);
                                       ^~~~~~~~~
examples/hello_world.rs:26:13: 26:24 warning: variable `errorString` should have a snake case name such as `error_string`, #[warn(non_snake_case)] on by default
examples/hello_world.rs:26         let errorString = ffi::qmlbind_component_get_error_string(component);
                                       ^~~~~~~~~~~
error: linking with `cc` failed: exit code: 1
note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/examples/hello_world.0.o" "-o" "${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/examples/hello_world" "-Wl,--gc-sections" "-pie" "-nodefaultlibs" "-L" "${HOME}/qmlrsng.git/libqmlbind-sys/target/debug" "-L" "${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/deps" "-L" "libqmlbind/qmlbind" "-L" "${HOME}/Qt/5.7/gcc_64/lib" "-L" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,-Bdynamic" "${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/liblibqmlbind_sys.rlib" "${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/deps/liblibc-30d46fdd62f8c2eb.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcollections-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_unicode-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librand-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc_jemalloc-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-e8edd0fd.rlib" "${HOME}/.multirust/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-e8edd0fd.rlib" "-l" "Qt5Core" "-l" "Qt5Network" "-l" "Qt5Gui" "-l" "Qt5Qml" "-l" "Qt5Widgets" "-l" "icui18n" "-l" "icuuc" "-l" "icudata" "-l" "stdc++" "-l" "util" "-l" "dl" "-l" "pthread" "-l" "gcc_s" "-l" "pthread" "-l" "c" "-l" "m" "-l" "rt" "-l" "util" "-l" "compiler-rt"
note: /usr/bin/ld: warning: libicui18n.so.56, needed by ${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libicuuc.so.56, needed by ${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libicudata.so.56, needed by ${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so, not found (try using -rpath or -rpath-link)
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `u_strToLower_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_getStandardName_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_getAlias_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `uenum_next_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `u_strToUpper_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_setSubstChars_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_getTimeZoneDisplayName_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_fromUnicode_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `u_errorName_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `uenum_close_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_getDSTSavings_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_openTimeZoneIDEnumeration_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_setMillis_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucol_close_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucol_getSortKey_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_get_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucol_open_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_compareNames_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_clone_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_open_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucol_setAttribute_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_openCountryTimeZones_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_open_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_openTimeZones_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_countAliases_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_inDaylightTime_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_close_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_getAvailableName_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_getDefaultName_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucal_getDefaultTimeZone_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_toUnicode_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucol_strcoll_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_close_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_getMaxCharSize_56'
${HOME}/Qt/5.7/gcc_64/lib/libQt5Core.so: undefined reference to `ucnv_countAvailable_56'
collect2: error: ld returned 1 exit status

error: aborting due to previous error
error: Could not compile `libqmlbind-sys`.

Caused by:
  Process didn't exit successfully: `rustc examples/hello_world.rs --crate-name hello_world --crate-type bin -g --out-dir ${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/examples --emit=dep-info,link -L dependency=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug -L dependency=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/deps --extern libc=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/deps/liblibc-30d46fdd62f8c2eb.rlib --extern libqmlbind_sys=${HOME}/qmlrsng.git/libqmlbind-sys/target/debug/liblibqmlbind_sys.rlib -L libqmlbind/qmlbind -L ${HOME}/Qt/5.7/gcc_64/lib` (exit code: 101)

It seems cargo is trying to link to the system wide icu instead of the one provided by the installer.

[danielng01]

Hi,
I get this error when I was trying to build Iris under Ubuntu.
I solved it by removing
CONFIG += static
from the .pro file

[nbigaouette]

So Iris is a library that was built statically? I'd have to check back but I think icu is linked dynamically here...

[danielng01]

No, it's my application
The problem was
CONFIG += static
in the Pro file