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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 2021-05-17 17:08:57 +00:00
parent e8f585be70
commit c57ab17687
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GPG key ID: F9DBED4859B271C0
3 changed files with 9 additions and 4 deletions
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9
nix-rust/local.mk
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@ -8,8 +8,13 @@ endif
libnixrust_PATH := $(d)/target/$(RUST_DIR)/libnixrust.$(SO_EXT)
libnixrust_INSTALL_PATH := $(libdir)/libnixrust.$(SO_EXT)
libnixrust_LDFLAGS_USE := -L$(d)/target/$(RUST_DIR) -lnixrust -ldl
libnixrust_LDFLAGS_USE_INSTALLED := -L$(libdir) -lnixrust -ldl
libnixrust_LDFLAGS_USE := -L$(d)/target/$(RUST_DIR) -lnixrust
libnixrust_LDFLAGS_USE_INSTALLED := -L$(libdir) -lnixrust
ifeq ($(OS), Linux)
libnixrust_LDFLAGS_USE += -ldl
libnixrust_LDFLAGS_USE_INSTALLED += -ldl
endif
ifeq ($(OS), Darwin)
libnixrust_BUILD_FLAGS = NIX_LDFLAGS="-undefined dynamic_lookup"