Isolation: fixed the generation of mounts table.

Since the introduction of rootfs feature, some language modules
can't be configured multiple times.

Now the configure generates a separate nxt_<module>_mounts.h for
each module compiled.

auto/modules/java

@@ -227,7 +227,6 @@ NXT_JAVA_INSTALL_JARS=
 NXT_JAVA_UNINSTALL_JARS=
 
 NXT_JAVA_JARS=$NXT_BUILD_DIR/$NXT_JAVA_MODULE/nxt_jars.h
-NXT_JAVA_MOUNTS_HEADER=$NXT_BUILD_DIR/$NXT_JAVA_MODULE/nxt_java_mounts.h
 mkdir -p $NXT_BUILD_DIR/$NXT_JAVA_MODULE
 
 cat << END > $NXT_JAVA_JARS
@@ -318,7 +317,10 @@ NXT_JAVA_LIBC_DIR=`ldd "$NXT_JAVA_LIBJVM" | grep libc.so | cut -d' ' -f3`
 NXT_JAVA_LIBC_DIR=`dirname $NXT_JAVA_LIBC_DIR`
 fi
 
-cat << END > $NXT_JAVA_MOUNTS_HEADER
+
+NXT_JAVA_MOUNTS_HEADER=nxt_${NXT_JAVA_MODULE}_mounts.h
+
+cat << END > $NXT_BUILD_DIR/$NXT_JAVA_MOUNTS_HEADER
 #ifndef _NXT_JAVA_MOUNTS_H_INCLUDED_
 #define _NXT_JAVA_MOUNTS_H_INCLUDED_
 
@@ -371,7 +373,8 @@ for nxt_src in $NXT_JAVA_MODULE_SRCS; do
 
 $NXT_BUILD_DIR/$nxt_obj: $nxt_src $NXT_VERSION_H
 	mkdir -p $NXT_BUILD_DIR/src/java
-	\$(CC) -c \$(CFLAGS) \$(NXT_INCS) $NXT_JAVA_INCLUDE \\
+	\$(CC) -c \$(CFLAGS) -DNXT_JAVA_MOUNTS_H=\"$NXT_JAVA_MOUNTS_HEADER\" \\
+           \$(NXT_INCS) $NXT_JAVA_INCLUDE \\
 	$nxt_dep_flags \\
 	-o $NXT_BUILD_DIR/$nxt_obj $nxt_src
 	$nxt_dep_post

auto/modules/python

@@ -130,13 +130,13 @@ if grep ^$NXT_PYTHON_MODULE: $NXT_MAKEFILE 2>&1 > /dev/null; then
 fi
 
 
-NXT_PYTHON_MOUNTS_HEADER=$NXT_BUILD_DIR/nxt_python_mounts.h
+NXT_PYTHON_MOUNTS_HEADER=nxt_${NXT_PYTHON_MODULE}_mounts.h
 
 $NXT_PYTHON -c 'import os.path
 import sys
 pyver = "python" + str(sys.version_info[0]) + "." + str(sys.version_info[1])
 
-print("static const nxt_fs_mount_t  nxt_python%d%d_mounts[] = {" % (sys.version_info[0], sys.version_info[1]))
+print("static const nxt_fs_mount_t  nxt_python_mounts[] = {")
 
 pattern = "{(u_char *) \"%s\", (u_char *) \"%s\", (u_char *) \"bind\", NXT_MS_BIND|NXT_MS_REC, NULL},"
 base = None
@@ -157,7 +157,7 @@ for p in sys.path:
 
 print("};\n\n")
 
-' >> $NXT_PYTHON_MOUNTS_HEADER
+' > $NXT_BUILD_DIR/$NXT_PYTHON_MOUNTS_HEADER
 
 
 $echo " + Python module: ${NXT_PYTHON_MODULE}.unit.so"
@@ -185,7 +185,8 @@ for nxt_src in $NXT_PYTHON_MODULE_SRCS; do
     cat << END >> $NXT_MAKEFILE
 
 $NXT_BUILD_DIR/$nxt_obj:	$nxt_src $NXT_VERSION_H
-	\$(CC) -c \$(CFLAGS) \$(NXT_INCS) $NXT_PYTHON_INCLUDE \\
+	\$(CC) -c \$(CFLAGS) -DNXT_PYTHON_MOUNTS_H=\"$NXT_PYTHON_MOUNTS_HEADER\" \\
+           \$(NXT_INCS) $NXT_PYTHON_INCLUDE \\
 	$nxt_dep_flags \\
 	-o $NXT_BUILD_DIR/$nxt_obj $nxt_src
 	$nxt_dep_post

auto/modules/ruby

@@ -51,7 +51,6 @@ $echo "configuring Ruby module ..." >> $NXT_AUTOCONF_ERR
 
 NXT_RUBY=${NXT_RUBY=ruby}
 NXT_RUBY_MODULE=${NXT_RUBY_MODULE=${NXT_RUBY}}
-NXT_RUBY_MOUNTS_HEADER=$NXT_BUILD_DIR/nxt_ruby_mounts.h
 
 nxt_found=no
 
@@ -145,7 +144,10 @@ if grep ^$NXT_RUBY_MODULE: $NXT_MAKEFILE 2>&1 > /dev/null; then
 fi
 
 
-cat << END > $NXT_RUBY_MOUNTS_HEADER
+NXT_RUBY_MOUNTS_HEADER=nxt_${NXT_RUBY_MODULE}_mounts.h
+NXT_RUBY_MOUNTS_PATH=$NXT_BUILD_DIR/$NXT_RUBY_MOUNTS_HEADER
+
+cat << END > $NXT_RUBY_MOUNTS_PATH
 
 static const nxt_fs_mount_t  nxt_ruby_mounts[] = {
     {(u_char *) "$NXT_RUBY_RUBYHDRDIR", (u_char *) "$NXT_RUBY_RUBYHDRDIR",
@@ -166,11 +168,11 @@ static const nxt_fs_mount_t  nxt_ruby_mounts[] = {
 END
 
 for path in `echo $NXT_RUBY_GEMPATH | tr ':' '\n'`; do
-   $echo "{(u_char *) \"$path\", (u_char *) \"$path\"," >> $NXT_RUBY_MOUNTS_HEADER
-   $echo "(u_char *) \"bind\", NXT_MS_BIND | NXT_MS_REC, NULL}," >> $NXT_RUBY_MOUNTS_HEADER
+   $echo "{(u_char *) \"$path\", (u_char *) \"$path\"," >> $NXT_RUBY_MOUNTS_PATH
+   $echo "(u_char *) \"bind\", NXT_MS_BIND | NXT_MS_REC, NULL}," >> $NXT_RUBY_MOUNTS_PATH
 done
 
-$echo "};" >> $NXT_RUBY_MOUNTS_HEADER
+$echo "};" >> $NXT_RUBY_MOUNTS_PATH
 
 
 $echo " + Ruby module: ${NXT_RUBY_MODULE}.unit.so"
@@ -200,7 +202,8 @@ for nxt_src in $NXT_RUBY_MODULE_SRCS; do
 
 $NXT_BUILD_DIR/$nxt_obj:	$nxt_src $NXT_VERSION_H
 	mkdir -p $NXT_BUILD_DIR/src/ruby
-	\$(CC) -c \$(CFLAGS) \$(NXT_INCS) $NXT_RUBY_INCPATH \\
+	\$(CC) -c \$(CFLAGS) -DNXT_RUBY_MOUNTS_H=\"$NXT_RUBY_MOUNTS_HEADER\" \\
+           \$(NXT_INCS) $NXT_RUBY_INCPATH \\
 	$nxt_dep_flags \\
 	-o $NXT_BUILD_DIR/$nxt_obj $nxt_src
 	$nxt_dep_post

src/nxt_java.c

@@ -26,7 +26,8 @@
 #include "java/nxt_jni_URLClassLoader.h"
 
 #include "nxt_jars.h"
-#include "nxt_java_mounts.h"
+
+#include NXT_JAVA_MOUNTS_H
 
 static nxt_int_t nxt_java_setup(nxt_task_t *task, nxt_process_t *process,
     nxt_common_app_conf_t *conf);

src/nxt_python_wsgi.c

@@ -18,7 +18,8 @@
 #include <nxt_unit_field.h>
 #include <nxt_unit_request.h>
 #include <nxt_unit_response.h>
-#include <nxt_python_mounts.h>
+
+#include NXT_PYTHON_MOUNTS_H
 
 /*
  * According to "PEP 3333 / A Note On String Types"
@@ -39,11 +40,6 @@
  */
 
 
-#define _NXT_PYTHON_MOUNTS(major, minor)                                      \
-    nxt_python ## major ## minor ## _mounts
-
-#define NXT_PYTHON_MOUNTS(major, minor) _NXT_PYTHON_MOUNTS(major, minor)
-
 #if PY_MAJOR_VERSION == 3
 #define NXT_PYTHON_BYTES_TYPE       "bytestring"
 
@@ -123,8 +119,8 @@ NXT_EXPORT nxt_app_module_t  nxt_app_module = {
     compat,
     nxt_string("python"),
     PY_VERSION,
-    NXT_PYTHON_MOUNTS(PY_MAJOR_VERSION, PY_MINOR_VERSION),
-    nxt_nitems(NXT_PYTHON_MOUNTS(PY_MAJOR_VERSION, PY_MINOR_VERSION)),
+    nxt_python_mounts,
+    nxt_nitems(nxt_python_mounts),
     NULL,
     nxt_python_start,
 };

src/ruby/nxt_ruby.c

@@ -7,7 +7,8 @@
 
 #include <nxt_unit.h>
 #include <nxt_unit_request.h>
-#include <nxt_ruby_mounts.h>
+
+#include NXT_RUBY_MOUNTS_H
 
 
 #define NXT_RUBY_RACK_API_VERSION_MAJOR  1