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lang/ghc810: Add upstream patch fixing a rare linking problem.

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lang/ghc does not require patching.
This commit is contained in:
Gleb Popov 2022-10-11 22:51:42 +03:00
parent b532c5dd96
commit 8fb4cfcd3b
2 changed files with 90 additions and 0 deletions
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1
lang/ghc810/Makefile
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@ -1,3 +1,4 @@
PORTREVISION= 1
PKGNAMESUFFIX= 810
LIB_DEPENDS= ${GMP_LIB_DEPENDS}

89
lang/ghc810/files/patch-linker-iconv.diff Normal file
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@ -0,0 +1,89 @@
https://gitlab.haskell.org/ghc/ghc/-/commit/66d2e927842653fbc1cf2e6f997f443c78c2203b
diff --git a/rts/Linker.c b/rts/Linker.c
index 1faff3b3716dd6de440071c89d0dafa471657962..12d5418d02a95893b14a619be10b5cd49a054f1a 100644
--- rts/Linker.c
+++ rts/Linker.c
@@ -80,6 +80,33 @@
#if defined(dragonfly_HOST_OS)
#include <sys/tls.h>
#endif
+
+/*
+ * Note [iconv and FreeBSD]
+ * ~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * On FreeBSD libc.so provides an implementation of the iconv_* family of
+ * functions. However, due to their implementation, these symbols cannot be
+ * resolved via dlsym(); rather, they can only be resolved using the
+ * explicitly-versioned dlvsym().
+ *
+ * This is problematic for the RTS linker since we may be asked to load
+ * an object that depends upon iconv. To handle this we include a set of
+ * fallback cases for these functions, allowing us to resolve them to the
+ * symbols provided by the libc against which the RTS is linked.
+ *
+ * See #20354.
+ */
+
+#if defined(freebsd_HOST_OS)
+extern void iconvctl();
+extern void iconv_open_into();
+extern void iconv_open();
+extern void iconv_close();
+extern void iconv_canonicalize();
+extern void iconv();
+#endif
+
/*
Note [runtime-linker-support]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -637,6 +664,10 @@ internal_dlsym(const char *symbol) {
}
RELEASE_LOCK(&dl_mutex);
+ IF_DEBUG(linker, debugBelch("internal_dlsym: looking for symbol '%s' in special cases\n", symbol));
+# define SPECIAL_SYMBOL(sym) \
+ if (strcmp(symbol, #sym) == 0) return (void*)&sym;
+
# if defined(HAVE_SYS_STAT_H) && defined(linux_HOST_OS) && defined(__GLIBC__)
// HACK: GLIBC implements these functions with a great deal of trickery where
// they are either inlined at compile time to their corresponding
@@ -646,18 +677,28 @@ internal_dlsym(const char *symbol) {
// We borrow the approach that the LLVM JIT uses to resolve these
// symbols. See http://llvm.org/PR274 and #7072 for more info.
- IF_DEBUG(linker, debugBelch("internal_dlsym: looking for symbol '%s' in GLIBC special cases\n", symbol));
+ SPECIAL_SYMBOL(stat);
+ SPECIAL_SYMBOL(fstat);
+ SPECIAL_SYMBOL(lstat);
+ SPECIAL_SYMBOL(stat64);
+ SPECIAL_SYMBOL(fstat64);
+ SPECIAL_SYMBOL(lstat64);
+ SPECIAL_SYMBOL(atexit);
+ SPECIAL_SYMBOL(mknod);
+# endif
- if (strcmp(symbol, "stat") == 0) return (void*)&stat;
- if (strcmp(symbol, "fstat") == 0) return (void*)&fstat;
- if (strcmp(symbol, "lstat") == 0) return (void*)&lstat;
- if (strcmp(symbol, "stat64") == 0) return (void*)&stat64;
- if (strcmp(symbol, "fstat64") == 0) return (void*)&fstat64;
- if (strcmp(symbol, "lstat64") == 0) return (void*)&lstat64;
- if (strcmp(symbol, "atexit") == 0) return (void*)&atexit;
- if (strcmp(symbol, "mknod") == 0) return (void*)&mknod;
+ // See Note [iconv and FreeBSD]
+# if defined(freebsd_HOST_OS)
+ SPECIAL_SYMBOL(iconvctl);
+ SPECIAL_SYMBOL(iconv_open_into);
+ SPECIAL_SYMBOL(iconv_open);
+ SPECIAL_SYMBOL(iconv_close);
+ SPECIAL_SYMBOL(iconv_canonicalize);
+ SPECIAL_SYMBOL(iconv);
# endif
+#undef SPECIAL_SYMBOL
+
// we failed to find the symbol
return NULL;
}