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Check for process_vm_readv using CheckSymbolExists 

Instead of checking if code compiles, I think it is a better to check
if the symbol exists. This is simpler and should do the same thing.

Differential Revision: https://reviews.llvm.org/D47897

llvm-svn: 334219
This commit is contained in:
Alex Langford 2018-06-07 19:53:25 +00:00
parent e8eb567e17
commit 05c10d0def
1 changed files with 2 additions and 8 deletions
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10
lldb/cmake/modules/LLDBGenerateConfig.cmake
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@ -14,14 +14,8 @@ check_cxx_symbol_exists(accept4 "sys/socket.h" HAVE_ACCEPT4)
check_include_file(termios.h HAVE_TERMIOS_H)
check_include_files("sys/types.h;sys/event.h" HAVE_SYS_EVENT_H)
check_cxx_source_compiles("
#include <sys/uio.h>
int main() { process_vm_readv(0, nullptr, 0, nullptr, 0, 0); return 0; }"
HAVE_PROCESS_VM_READV)
check_cxx_source_compiles("
#include <sys/syscall.h>
int main() { return __NR_process_vm_readv; }"
HAVE_NR_PROCESS_VM_READV)
check_cxx_symbol_exists(process_vm_readv "sys/uio.h" HAVE_PROCESS_VM_READV)
check_cxx_symbol_exists(__NR_process_vm_readv "sys/syscall.h" HAVE_NR_PROCESS_VM_READV)
check_library_exists(compression compression_encode_buffer "" HAVE_LIBCOMPRESSION)