build: remove BUILD_ROOT variable

This variable is unnecessary as absolute paths are not required.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Makefile

@@ -202,15 +202,15 @@ ffservertest: ffserver$(EXESUF) tests/vsynth1/00.pgm tests/data/asynth1.sw
 
 tests/vsynth1/00.pgm: tests/videogen$(HOSTEXESUF)
 	@mkdir -p tests/vsynth1
-	$(M)$(BUILD_ROOT)/$< 'tests/vsynth1/'
+	$(M)./$< 'tests/vsynth1/'
 
 tests/vsynth2/00.pgm: tests/rotozoom$(HOSTEXESUF)
 	@mkdir -p tests/vsynth2
-	$(M)$(BUILD_ROOT)/$< 'tests/vsynth2/' $(SRC_PATH)/tests/lena.pnm
+	$(M)./$< 'tests/vsynth2/' $(SRC_PATH)/tests/lena.pnm
 
 tests/data/asynth1.sw: tests/audiogen$(HOSTEXESUF)
 	@mkdir -p tests/data
-	$(M)$(BUILD_ROOT)/$< $@
+	$(M)./$< $@
 
 tests/data/asynth1.sw tests/vsynth%/00.pgm: TAG = GEN
 

common.mak

@@ -12,12 +12,6 @@ vpath %.S   $(SRC_DIR)
 vpath %.asm $(SRC_DIR)
 vpath %.v   $(SRC_DIR)
 
-ifeq ($(SRC_DIR),$(SRC_PATH_BARE))
-BUILD_ROOT_REL = .
-else
-BUILD_ROOT_REL = ..
-endif
-
 ifndef V
 Q      = @
 ECHO   = printf "$(1)\t%s\n" $(2)
@@ -33,7 +27,7 @@ endif
 
 ALLFFLIBS = avcodec avdevice avfilter avformat avutil postproc swscale
 
-IFLAGS   := -I$(BUILD_ROOT_REL) -I$(SRC_PATH)
+IFLAGS   := -I. -I$(SRC_PATH)
 CPPFLAGS := $(IFLAGS) $(CPPFLAGS)
 CFLAGS   += $(ECFLAGS)
 YASMFLAGS += $(IFLAGS) -Pconfig.asm
@@ -85,7 +79,7 @@ FFLIBS    := $(FFLIBS-yes) $(FFLIBS)
 TESTPROGS += $(TESTPROGS-yes)
 
 FFEXTRALIBS := $(addprefix -l,$(addsuffix $(BUILDSUF),$(FFLIBS))) $(EXTRALIBS)
-FFLDFLAGS   := $(addprefix -L$(BUILD_ROOT)/lib,$(ALLFFLIBS)) $(LDFLAGS)
+FFLDFLAGS   := $(addprefix -Llib,$(ALLFFLIBS)) $(LDFLAGS)
 
 EXAMPLES  := $(addprefix $(SUBDIR),$(addsuffix -example$(EXESUF),$(EXAMPLES)))
 OBJS      := $(addprefix $(SUBDIR),$(sort $(OBJS)))
@@ -94,7 +88,7 @@ TESTPROGS := $(addprefix $(SUBDIR),$(addsuffix -test$(EXESUF),$(TESTPROGS)))
 HOSTOBJS  := $(addprefix $(SUBDIR),$(addsuffix .o,$(HOSTPROGS)))
 HOSTPROGS := $(addprefix $(SUBDIR),$(addsuffix $(HOSTEXESUF),$(HOSTPROGS)))
 
-DEP_LIBS := $(foreach NAME,$(FFLIBS),$(BUILD_ROOT_REL)/lib$(NAME)/$($(CONFIG_SHARED:yes=S)LIBNAME))
+DEP_LIBS := $(foreach NAME,$(FFLIBS),lib$(NAME)/$($(CONFIG_SHARED:yes=S)LIBNAME))
 
 ALLHEADERS := $(subst $(SRC_DIR)/,$(SUBDIR),$(wildcard $(SRC_DIR)/*.h $(SRC_DIR)/$(ARCH)/*.h))
 SKIPHEADERS += $(addprefix $(ARCH)/,$(ARCH_HEADERS))

configure

@@ -2989,7 +2989,7 @@ enabled extra_warnings && check_cflags -Winline
 
 # add some linker flags
 check_ldflags -Wl,--warn-common
-check_ldflags '-Wl,-rpath-link,\$(BUILD_ROOT)/libpostproc -Wl,-rpath-link,\$(BUILD_ROOT)/libswscale -Wl,-rpath-link,\$(BUILD_ROOT)/libavfilter -Wl,-rpath-link,\$(BUILD_ROOT)/libavdevice -Wl,-rpath-link,\$(BUILD_ROOT)/libavformat -Wl,-rpath-link,\$(BUILD_ROOT)/libavcodec -Wl,-rpath-link,\$(BUILD_ROOT)/libavutil'
+check_ldflags -Wl,-rpath-link,libpostproc -Wl,-rpath-link,libswscale -Wl,-rpath-link,libavfilter -Wl,-rpath-link,libavdevice -Wl,-rpath-link,libavformat -Wl,-rpath-link,libavcodec -Wl,-rpath-link,libavutil
 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
 
 echo "X{};" > $TMPV
@@ -3253,7 +3253,6 @@ DATADIR=\$(DESTDIR)$datadir
 MANDIR=\$(DESTDIR)$mandir
 SRC_PATH="$source_path"
 SRC_PATH_BARE=$source_path
-BUILD_ROOT="$PWD"
 CC_IDENT=$cc_ident
 ARCH=$arch
 CC=$cc