From da99a7f515cddb7e9eebd81283375c245e1625d4 Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erik.decastrolopo@ambiata.com>
Date: Tue, 16 Aug 2016 06:41:19 +1000
Subject: Darwin: Detect broken NM program at configure time

Some recent versions of XCode ship a broken version of `nm`. Detect this
at configure time, and error out with a suggestion to rerun configure
with a `--with-nm=...` argument.

Test Plan: Test of Linux and OS X

Reviewers: carter, hvr, austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2425
---
 configure.ac | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index acd33cf22c..ea3ba4efc8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -483,6 +483,32 @@ AC_SUBST([LdCmd])
 dnl ** Which nm to use?
 dnl --------------------------------------------------------------
 FP_ARG_WITH_PATH_GNU_PROG([NM], [nm], [nm])
+
+if test "$TargetOS_CPP" = "darwin"
+then
+    AC_MSG_CHECKING(whether nm program is broken)
+    # Some versions of XCode ship a broken version of `nm`. Detect and work
+    # around this issue. See : https://ghc.haskell.org/trac/ghc/ticket/11744
+    nmver=$(${NM} --version | grep version | sed 's/ //g')
+    case "$nmver" in
+        LLVMversion7.3.0|LLVMversion7.3.1)
+            AC_MSG_RESULT(yes)
+            echo "The detected nm program is broken."
+            echo
+            echo "See: https://ghc.haskell.org/trac/ghc/ticket/11744"
+            echo
+            echo "Try re-running configure with:"
+            echo
+            echo '   ./configure --with-nm=$(xcrun --find nm-classic)'
+            echo
+            exit 1
+            ;;
+        *)
+            AC_MSG_RESULT(no)
+            ;;
+        esac
+fi
+
 NmCmd="$NM"
 AC_SUBST([NmCmd])
 
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