From patchwork Thu Aug 24 20:32:25 2017
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Subject: [3/4] makedef: Extend the script for use with mingw tools as well
X-Patchwork-Submitter: =?utf-8?q?Martin_Storsj=C3=B6?= <martin@martin.st>
X-Patchwork-Id: 63782
Message-Id: <1503606746-21606-3-git-send-email-martin@martin.st>
To: libav-devel@libav.org
Date: Thu, 24 Aug 2017 23:32:25 +0300
From: =?utf-8?q?Martin_Storsj=C3=B6?= <martin@martin.st>
List-Id: libav development <libav-devel.libav.org>

This is invoked by setting the NM and AR variables to the names of
those specific tools. The ARCH variable also needs to be provided,
to choose the symbol prefix (nm doesn't provide any option that
dumps the architecture easily).
---
 compat/windows/makedef | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/compat/windows/makedef b/compat/windows/makedef
index b3de992..b321d84 100755
--- a/compat/windows/makedef
+++ b/compat/windows/makedef
@@ -45,7 +45,11 @@ libname=$(mktemp -u "library").lib
 
 trap 'rm -f -- $libname' EXIT
 
-lib -out:${libname} $@ >/dev/null
+if [ -n "$AR" ]; then
+    $AR rcs ${libname} $@ >/dev/null
+else
+    lib -out:${libname} $@ >/dev/null
+fi
 if [ $? != 0 ]; then
     echo "Could not create temporary library." >&2
     exit 1
@@ -57,6 +61,15 @@ IFS='
 # Determine if we're building for x86 or x86_64 and
 # set the symbol prefix accordingly.
 prefix=""
+if [ -n "$NM" ]; then
+    case $ARCH in
+    *86)
+        prefix="_"
+        ;;
+    *)
+        ;;
+    esac
+else
 arch=$(dumpbin -headers ${libname} |
        tr '\t' ' ' |
        grep '^ \+.\+machine \+(.\+)' |
@@ -71,6 +84,7 @@ else
         exit 1
     fi
 fi
+fi
 
 started=0
 regex="none"
@@ -112,10 +126,19 @@ for line in $(cat ${vscript} | tr '\t' ' '); do
 '
 done
 
+if [ -n "$NM" ]; then
+# Use eval, since NM="nm -g"
+dump=$(eval "$NM --defined-only -g ${libname}" |
+          grep -v : |
+          grep -v ^$ |
+          cut -d' ' -f3 |
+          sed -e "s/^${prefix}//")
+else
 dump=$(dumpbin -linkermember:1 ${libname} |
           sed -e '/public symbols/,$!d' -e '/^ \{1,\}Summary/,$d' -e "s/ \{1,\}${prefix}/ /" -e 's/ \{1,\}/ /g' |
           tail -n +2 |
           cut -d' ' -f3)
+fi
 
 rm ${libname}