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cmake: For gcc8 use linker to find paths to libc, libm, libstdc++, etc

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Removes the need to know/guess the paths to these libraries. Once we are gcc 8 only, we
can remove -nostdlib and no additional arguments are needed for system libraries.

The catch is: any time IDF overrides a symbol in the toolchain sysroot, we need
an undefined linker marker to make sure this symbol is seen by linker.
This commit is contained in:
Angus Gratton
2019-04-15 13:45:08 +10:00
committed by Renz Christian Bagaporo
parent 2c12080049
commit 22514c1dd9
13 changed files with 83 additions and 41 deletions
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components/cxx/CMakeLists.txt
+1 -1
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@@ -2,7 +2,7 @@ set(COMPONENT_SRCS "cxx_exception_stubs.cpp"
"cxx_guards.cpp")
register_component()
target_link_libraries(${COMPONENT_LIB} stdc++)
target_link_libraries(${COMPONENT_LIB} stdc++ gcc)
target_link_libraries(${COMPONENT_LIB} "-u __cxa_guard_dummy")
if(NOT CONFIG_COMPILER_CXX_EXCEPTIONS)