fix link when 2 modules have same symbols

Rename static modules symbols in order to have unique symbols.

Close #13966

.gitignore

@@ -3,6 +3,7 @@
 
 # Android .so
 /android-libs/**/*.so
+.modules/
 
 # tmp dir used by gdb.sh
 .gdb

compile-libvlc.sh

@@ -537,6 +537,10 @@ cd $SRC_DIR
 # libVLC modules #
 ##################
 
+REDIFINED_VLC_MODULES_DIR=$SRC_DIR/.modules/${VLC_BUILD_DIR}
+rm -rf ${REDIFINED_VLC_MODULES_DIR}
+mkdir -p ${REDIFINED_VLC_MODULES_DIR}
+
 echo "Generating static module list"
 blacklist_regexp=
 for i in ${VLC_MODULE_BLACKLIST}
@@ -548,24 +552,50 @@ do
         blacklist_regexp="${blacklist_regexp}|${i}"
     fi
 done
-VLC_MODULES=`find vlc/$VLC_BUILD_DIR/modules -name 'lib*plugin.a' | grep -vE "lib(${blacklist_regexp})_plugin.a" | tr '\n' ' '`
 
+find_modules()
+{
+    echo "`find $1 -name 'lib*plugin.a' | grep -vE "lib(${blacklist_regexp})_plugin.a" | tr '\n' ' '`"
+}
+
+get_symbol()
+{
+    echo "$1" | grep vlc_entry_$2|cut -d" " -f 3
+}
+
+VLC_MODULES=$(find_modules vlc/$VLC_BUILD_DIR/modules)
 DEFINITION="";
 BUILTINS="const void *vlc_static_modules[] = {\n";
 for file in $VLC_MODULES; do
-    symbol=`"${CROSS_COMPILE}nm" -g $file | grep vlc_entry__|cut -d" " -f 3`
-    DEFINITION=$DEFINITION"int $symbol (int (*)(void *, void *, int, ...), void *);\n"; \
-    BUILTINS="$BUILTINS $symbol,\n"; \
-done; \
+    outfile=${REDIFINED_VLC_MODULES_DIR}/`basename $file`
+    name=`echo $file | sed 's/.*\.libs\/lib//' | sed 's/_plugin\.a//'`;
+    symbols=$("${CROSS_COMPILE}nm" -g $file)
+
+    # assure that all modules have differents entry symbols
+    entry=$(get_symbol "$symbols" _)
+    copyright=$(get_symbol "$symbols" copyright)
+    license=$(get_symbol "$symbols" license)
+    cat <<EOF > ${REDIFINED_VLC_MODULES_DIR}/syms
+$entry vlc_entry__$name
+$copyright vlc_entry_copyright__$name
+$license vlc_entry_license__$name
+EOF
+    ${CROSS_COMPILE}objcopy --redefine-syms ${REDIFINED_VLC_MODULES_DIR}/syms $file $outfile
+    checkfail "objcopy failed"
+
+    DEFINITION=$DEFINITION"int vlc_entry__$name (int (*)(void *, void *, int, ...), void *);\n";
+    BUILTINS="$BUILTINS vlc_entry__$name,\n";
+done;
 BUILTINS="$BUILTINS NULL\n};\n"; \
-printf "/* Autogenerated from the list of modules */\n $DEFINITION\n $BUILTINS\n" > libvlc/jni/libvlcjni.h
+printf "/* Autogenerated from the list of modules */\n$DEFINITION\n$BUILTINS\n" > libvlc/jni/libvlcjni.h
+rm ${REDIFINED_VLC_MODULES_DIR}/syms
 
 ###############################
 # NDK-Build for libvlcjni.so  #
 ###############################
 
 LIBVLC_LIBS="libvlcjni"
-VLC_MODULES=`echo $VLC_MODULES|sed "s|vlc/$VLC_BUILD_DIR|../vlc/$VLC_BUILD_DIR|g"`
+VLC_MODULES=$(find_modules ${REDIFINED_VLC_MODULES_DIR})
 VLC_SRC_DIR="$SRC_DIR/vlc"
 ANDROID_SYS_HEADERS="$SRC_DIR/android-headers"
 VLC_CONTRIB="$VLC_SRC_DIR/contrib/$TARGET_TUPLE"