[clang] fb9a82b - [clang-repl] Refine fix for linker error: PLT offset too large
Stefan Gränitz via cfe-commits
cfe-commits at lists.llvm.org
Wed Jan 24 02:45:45 PST 2024
Author: Stefan Gränitz
Date: 2024-01-24T11:45:04+01:00
New Revision: fb9a82b0235713782c1cf9d1eba20ce8d95766f7
URL: https://github.com/llvm/llvm-project/commit/fb9a82b0235713782c1cf9d1eba20ce8d95766f7
DIFF: https://github.com/llvm/llvm-project/commit/fb9a82b0235713782c1cf9d1eba20ce8d95766f7.diff
LOG: [clang-repl] Refine fix for linker error: PLT offset too large
This is a follow-up improvement after the discussion in #78959
Added:
Modified:
clang/tools/clang-repl/CMakeLists.txt
Removed:
################################################################################
diff --git a/clang/tools/clang-repl/CMakeLists.txt b/clang/tools/clang-repl/CMakeLists.txt
index 031dcaba5e4468..d3dec1984b78d2 100644
--- a/clang/tools/clang-repl/CMakeLists.txt
+++ b/clang/tools/clang-repl/CMakeLists.txt
@@ -23,12 +23,13 @@ if(CLANG_PLUGIN_SUPPORT)
export_executable_symbols_for_plugins(clang-repl)
endif()
-string(TOUPPER "${CMAKE_SYSTEM_PROCESSOR}" system_processor)
-if(system_processor MATCHES "ARM")
- set(FLAG_LONG_PLT "-Wl,--long-plt")
- llvm_check_linker_flag(CXX ${FLAG_LONG_PLT} LINKER_HAS_FLAG_LONG_PLT)
- # Linkers without this flag are assumed to have long PLTs by default
- if(LINKER_HAS_FLAG_LONG_PLT)
- target_link_options(clang-repl PRIVATE ${FLAG_LONG_PLT})
- endif()
+# The clang-repl binary can get huge with static linking in debug mode.
+# Some 32-bit targets use PLT slots with limited branch range by default and we
+# start to exceed this limit, e.g. when linking for arm-linux-gnueabihf with
+# gold. This flag tells the linker to build a PLT for the full address range.
+# Linkers without this flag are assumed to support proper PLTs by default.
+set(flag_long_plt "-Wl,--long-plt")
+llvm_check_linker_flag(CXX ${flag_long_plt} HAVE_LINKER_FLAG_LONG_PLT)
+if(HAVE_LINKER_FLAG_LONG_PLT)
+ target_link_options(clang-repl PRIVATE ${flag_long_plt})
endif()
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