File _service:tar_git:0023-Support-build-in-place-to-run-build-and-install-from.patch of Package rpm

From e23637f5a6838b3f9a96927bd5e64fe9d76be2ea Mon Sep 17 00:00:00 2001
From: David Greaves <david@dgreaves.com>
Date: Fri, 19 Apr 2013 19:50:14 +0100
Subject: [PATCH] Support --build-in-place to run build and install from CWD

Control using _build_in_place macro which can be set by the new arg

Sets _builddir macro to cwd and skips handling of -n and untar in the
%setup script.

Signed-off-by: David Greaves <david@dgreaves.com>
---
 build/parsePrep.c | 10 ++++++++++
 rpmbuild.c        | 15 +++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/build/parsePrep.c b/build/parsePrep.c
index 4c96343..2808d63 100644
--- a/build/parsePrep.c
+++ b/build/parsePrep.c
@@ -262,6 +262,7 @@ static int doSetupMacro(rpmSpec spec, const char *line)
     uint32_t num;
     int leaveDirs = 0, skipDefaultAction = 0;
     int createDir = 0, quietly = 0;
+    int buildInPlace = 0;
     const char * dirName = NULL;
     struct poptOption optionsTable[] = {
 	    { NULL, 'a', POPT_ARG_STRING, NULL, 'a',	NULL, NULL},
@@ -315,7 +316,16 @@ static int doSetupMacro(rpmSpec spec, const char *line)
 		  headerGetString(spec->packages->header, RPMTAG_NAME),
 		  headerGetString(spec->packages->header, RPMTAG_VERSION));
     }
+    /* Mer addition - support --build-in-place */
+    if (rpmExpandNumeric("%{_build_in_place}")) {
+	buildInPlace = 1;
+	spec->buildSubdir = NULL;
+    }
     addMacro(spec->macros, "buildsubdir", NULL, spec->buildSubdir, RMIL_SPEC);
+    if (buildInPlace) {
+	rc = RPMRC_OK;
+	goto exit;
+    }
     
     /* cd to the build dir */
     {	char * buildDir = rpmGenPath(spec->rootDir, "%{_builddir}", "");
diff --git a/rpmbuild.c b/rpmbuild.c
index 32f49d3..90c54b4 100644
--- a/rpmbuild.c
+++ b/rpmbuild.c
@@ -28,6 +28,7 @@ static struct rpmBuildArguments_s rpmBTArgs;
 #define	POPT_NOBUILD		-1017
 #define	POPT_RMSPEC		-1019
 #define POPT_NODIRTOKENS	-1020
+#define POPT_BUILDINPLACE	-1021
 
 #define	POPT_REBUILD		0x4220
 #define	POPT_RECOMPILE		0x4320
@@ -58,6 +59,7 @@ static char buildChar = 0;		/*!< Build stage (one of "abcilps ") */
 static rpmBuildFlags nobuildAmount = 0;	/*!< Build stage disablers */
 static rpmBuildFlags dobuildAmount = 0;	/*!< Build stage enablers */
 static ARGV_t build_targets = NULL;	/*!< Target platform(s) */
+static int buildInPlace = 0;		/*!< from --build-in-place */
 
 static void buildArgCallback( poptContext con,
 	enum poptCallbackReason reason,
@@ -112,6 +114,10 @@ static void buildArgCallback( poptContext con,
 	spec_flags |= RPMSPEC_FORCE;
 	break;
 
+    case POPT_BUILDINPLACE:
+	rpmDefineMacro(NULL, "_build_in_place 1", 0);
+	buildInPlace = 1;
+	break;
     }
 }
 
@@ -191,6 +197,8 @@ static struct poptOption rpmBuildPoptTable[] = {
 
  { "buildroot", '\0', POPT_ARG_STRING, 0,  POPT_BUILDROOT,
 	N_("override build root"), "DIRECTORY" },
+ { "build-in-place", '\0', 0, 0, POPT_BUILDINPLACE,
+	N_("run build in current directory"), NULL },
  { "clean", '\0', 0, 0, POPT_RMBUILD,
 	N_("remove build tree when done"), NULL},
  { "force", '\0', POPT_ARGFLAG_DOC_HIDDEN, 0, RPMCLI_POPT_FORCE,
@@ -405,6 +413,13 @@ static int buildForTarget(rpmts ts, const char * arg, BTA_t ba)
     rpmSetTables(RPM_MACHTABLE_BUILDARCH, RPM_MACHTABLE_BUILDOS);
 #endif
 
+    /* Override default BUILD value for _builddir */
+    if (buildInPlace) {
+	char *cwd = rpmGetCwd();
+	addMacro(NULL, "_builddir", NULL, cwd, 0);		
+	free(cwd);
+    }
+    
     if (ba->buildRootOverride)
 	buildRootURL = rpmGenPath(NULL, ba->buildRootOverride, NULL);
 
-- 
1.8.3-rc3