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annotate gen/programs.cpp @ 1404:11b122f92136

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Now that templates instantiations are no longer emitted for all modules that even blink at them they seem to break due to being linkonce (if compiled with any optimization level > 0), so let's give them weak linkage instead. The difference is that unreferenced linkonce symbols can be deleted, while weak symbols need to be preserved.
author Frits van Bommel <fvbommel wxs.nl>
date Thu, 21 May 2009 15:23:28 +0200
parents a376776e2301
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1299
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1 #include "gen/programs.h"
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2
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3 #include "llvm/Support/CommandLine.h"
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4 #include "llvm/System/Program.h"
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5
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6 #include "root.h" // error(char*)
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7 #include "mars.h" // fatal()
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8
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9 using namespace llvm;
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10
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11 static cl::opt<std::string> gcc("gcc",
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12 cl::desc("GCC to use for assembling and linking"),
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13 cl::Hidden,
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14 cl::ZeroOrMore);
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17 sys::Path getGcc() {
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18 const char *cc = NULL;
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19
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20 if (gcc.getNumOccurrences() > 0 && gcc.length() > 0)
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21 cc = gcc.c_str();
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22
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23 if (!cc)
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24 cc = getenv("CC");
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25 if (!cc)
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26 cc = "gcc";
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28 sys::Path path = sys::Program::FindProgramByName(cc);
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29 if (path.empty() && !cc) {
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30 if (cc) {
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31 path.set(cc);
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32 } else {
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33 error("failed to locate gcc");
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34 fatal();
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35 }
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36 }
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37
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38 return path;
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39 }