From 5a3d86ff3308908a0d9f8f53b212fe3a218d1dfc Mon Sep 17 00:00:00 2001
From: Maxim Dounin <mdounin@mdounin.ru>
Date: Tue, 10 Nov 2020 17:13:20 +0300
Subject: [PATCH] Configure: shared sources for addon modules.

Addon modules, both dynamic and static, can now use shared source files.
Shared sources result in only one make rule even if specified several
times in different modules.
---
 auto/make    |  3 ++-
 auto/module  | 44 ++++++++++++++++++++++++++++++++++++++++++--
 auto/options |  1 +
 3 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/auto/make b/auto/make
index 041d280cd..ef7c9f694 100644
--- a/auto/make
+++ b/auto/make
@@ -502,6 +502,7 @@ fi
 for ngx_module in $DYNAMIC_MODULES
 do
     eval ngx_module_srcs="\$${ngx_module}_SRCS"
+    eval ngx_module_shrd="\$${ngx_module}_SHRD"
     eval eval ngx_module_libs="\\\"\$${ngx_module}_LIBS\\\""
 
     eval ngx_module_modules="\$${ngx_module}_MODULES"
@@ -567,7 +568,7 @@ END
         | sed -e "s/\(.*\.\)c/\1$ngx_objext/"`
 
     ngx_module_objs=
-    for ngx_src in $ngx_module_srcs
+    for ngx_src in $ngx_module_srcs $ngx_module_shrd
     do
         case "$ngx_src" in
             src/*)
diff --git a/auto/module b/auto/module
index a2b578db2..3857d04ca 100644
--- a/auto/module
+++ b/auto/module
@@ -17,7 +17,6 @@ if [ "$ngx_module_link" = DYNAMIC ]; then
     done
 
     DYNAMIC_MODULES="$DYNAMIC_MODULES $ngx_module"
-    eval ${ngx_module}_SRCS=\"$ngx_module_srcs\"
 
     eval ${ngx_module}_MODULES=\"$ngx_module_name\"
 
@@ -31,6 +30,30 @@ if [ "$ngx_module_link" = DYNAMIC ]; then
         eval ${ngx_module}_ORDER=\"$ngx_module_order\"
     fi
 
+    srcs=
+    shrd=
+    for src in $ngx_module_srcs
+    do
+        found=no
+        for old in $DYNAMIC_MODULES_SRCS
+        do
+            if [ $src = $old ]; then
+                found=yes
+                break
+            fi
+        done
+
+        if [ $found = no ]; then
+            srcs="$srcs $src"
+        else
+            shrd="$shrd $src"
+        fi
+    done
+    eval ${ngx_module}_SRCS=\"$srcs\"
+    eval ${ngx_module}_SHRD=\"$shrd\"
+
+    DYNAMIC_MODULES_SRCS="$DYNAMIC_MODULES_SRCS $srcs"
+
     if test -n "$ngx_module_incs"; then
         CORE_INCS="$CORE_INCS $ngx_module_incs"
     fi
@@ -107,7 +130,24 @@ elif [ "$ngx_module_link" = ADDON ]; then
     eval ${ngx_module_type}_MODULES=\"\$${ngx_module_type}_MODULES \
                                       $ngx_module_name\"
 
-    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_module_srcs"
+    srcs=
+    for src in $ngx_module_srcs
+    do
+        found=no
+        for old in $NGX_ADDON_SRCS
+        do
+            if [ $src = $old ]; then
+                found=yes
+                break
+            fi
+        done
+
+        if [ $found = no ]; then
+            srcs="$srcs $src"
+        fi
+    done
+
+    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $srcs"
 
     if test -n "$ngx_module_incs"; then
         eval ${ngx_var}_INCS=\"\$${ngx_var}_INCS $ngx_module_incs\"
diff --git a/auto/options b/auto/options
index 110141dcb..80be906e1 100644
--- a/auto/options
+++ b/auto/options
@@ -132,6 +132,7 @@ STREAM_UPSTREAM_ZONE=YES
 STREAM_SSL_PREREAD=NO
 
 DYNAMIC_MODULES=
+DYNAMIC_MODULES_SRCS=
 
 NGX_ADDONS=
 NGX_ADDON_SRCS=