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Only link with libdl on Linux

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Linux is (as far as I know) the only mainstream operating system that
requires linking with libdl for dlopen.  On BSD, libdl doesn't exist,
so on non-FreeBSD BSDs linking will currently fail.  On macOS, it's
apparently just a symlink to libSystem (macOS libc), presumably
present for compatibility with things that assume Linux.

So the right thing to do here is to only add -ldl on Linux, not to add
it for everything that isn't FreeBSD.
This commit is contained in:
Alyssa Ross
2021-06-01 08:05:21 +00:00
parent e8f585be70
commit c57ab17687
3 changed files with 9 additions and 4 deletions
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src/libexpr/local.mk
+1 -1
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@@ -16,7 +16,7 @@ libexpr_CXXFLAGS += -I src/libutil -I src/libstore -I src/libfetchers -I src/lib
libexpr_LIBS = libutil libstore libfetchers
libexpr_LDFLAGS = -lboost_context
ifneq ($(OS), FreeBSD)
ifeq ($(OS), Linux)
libexpr_LDFLAGS += -ldl
endif