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Fix ELF interpreter detection

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Use the same approach as with qmake, by using readelf -l /bin/ls and
then a regular expression to extract the program interpreter path. It's
a little simpler in cmake because we can avoid the perl dance and quotes
and just use cmake's built-in regular expression matching.

This change also excludes static builds, as with qmake.

Change-Id: I699e166c4b38b3fe98e6390316206109ad6363f9
Reviewed-by: Kevin Funk <kevin.funk@kdab.com>
This commit is contained in:
Simon Hausmann 2019-02-15 11:45:34 +01:00
parent 22bd8576cb
commit d885226544
1 changed files with 16 additions and 6 deletions
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22
src/corelib/CMakeLists.txt
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@ -268,12 +268,22 @@ set_property(TARGET Core APPEND PROPERTY PRIVATE_HEADER "${CMAKE_CURRENT_BINARY_
# FIXME: tools still have a lot of special stuff that is not ported!
# FIXME: qmake condition: (linux*|hurd*):!cross_compile:!static:!*-armcc*
# FIXME: qmake gets the elf interpreter out of /bin/ls
find_program(HOST_ELF_INTERPRETER NAMES ld-linux-x86-64.so.2 PATHS /lib /lib64 NO_DEFAULT_PATH)
if (LINUX AND NOT CMAKE_CROSSCOMPILING AND HOST_ELF_INTERPRETER_FOUND)
qt_internal_add_link_flags(Core "-Wl,-e,qt_core_boilerplate")
target_compile_definitions(Core PRIVATE ELF_INTERPRETER="${HOST_ELF_INTERPRETER}")
if (LINUX AND NOT CMAKE_CROSSCOMPILING AND BUILD_SHARED_LIBS)
if (NOT DEFINED ELF_INTERPRETER)
execute_process(COMMAND ${CMAKE_COMMAND} -E env LC_ALL=C readelf -l /bin/ls
RESULT_VARIABLE readelf_ok
OUTPUT_VARIABLE readelf_output
)
if ("${readelf_ok}" STREQUAL "0" AND "${readelf_output}" MATCHES "program interpreter: (.*)]")
set(ELF_INTERPRETER "${CMAKE_MATCH_1}" CACHE INTERNAL "ELF interpreter location")
else
set(ELF_INTERPRETER "" CACHE INTERNAL "ELF interpreter location")
endif()
endif()
if (ELF_INTERPRETER)
qt_internal_add_link_flags(Core "-Wl,-e,qt_core_boilerplate")
target_compile_definitions(Core PRIVATE ELF_INTERPRETER="${ELF_INTERPRETER}")
endif()
endif()