Regenerate.

55 files changed, 72 insertions, 102 deletions

diff --git a/c/src/lib/libbsp/arm/armulator/preinstall.am b/c/src/lib/libbsp/arm/armulator/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/arm/armulator/preinstall.am
+++ b/c/src/lib/libbsp/arm/armulator/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/arm/csb336/preinstall.am b/c/src/lib/libbsp/arm/csb336/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/arm/csb336/preinstall.am
+++ b/c/src/lib/libbsp/arm/csb336/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/arm/csb337/preinstall.am b/c/src/lib/libbsp/arm/csb337/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/arm/csb337/preinstall.am
+++ b/c/src/lib/libbsp/arm/csb337/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/arm/edb7312/preinstall.am b/c/src/lib/libbsp/arm/edb7312/preinstall.am
index a1ab484c6e..304c5326cf 100644
--- a/c/src/lib/libbsp/arm/edb7312/preinstall.am
+++ b/c/src/lib/libbsp/arm/edb7312/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/arm/gba/preinstall.am b/c/src/lib/libbsp/arm/gba/preinstall.am
index 6b0e05edf5..378efdf836 100644
--- a/c/src/lib/libbsp/arm/gba/preinstall.am
+++ b/c/src/lib/libbsp/arm/gba/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/arm/gp32/preinstall.am b/c/src/lib/libbsp/arm/gp32/preinstall.am
index c2adc5e94d..dd7d84cda8 100644
--- a/c/src/lib/libbsp/arm/gp32/preinstall.am
+++ b/c/src/lib/libbsp/arm/gp32/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/c4x/c4xsim/preinstall.am b/c/src/lib/libbsp/c4x/c4xsim/preinstall.am
index bfa2c444be..a5b3b15217 100644
--- a/c/src/lib/libbsp/c4x/c4xsim/preinstall.am
+++ b/c/src/lib/libbsp/c4x/c4xsim/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/h8300/h8sim/preinstall.am b/c/src/lib/libbsp/h8300/h8sim/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/h8300/h8sim/preinstall.am
+++ b/c/src/lib/libbsp/h8300/h8sim/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/i386/i386ex/preinstall.am b/c/src/lib/libbsp/i386/i386ex/preinstall.am
index 24fd1dfe23..1536e3b265 100644
--- a/c/src/lib/libbsp/i386/i386ex/preinstall.am
+++ b/c/src/lib/libbsp/i386/i386ex/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/i386/ts_386ex/preinstall.am b/c/src/lib/libbsp/i386/ts_386ex/preinstall.am
index 6e093af11a..267a63bae7 100644
--- a/c/src/lib/libbsp/i386/ts_386ex/preinstall.am
+++ b/c/src/lib/libbsp/i386/ts_386ex/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/av5282/preinstall.am b/c/src/lib/libbsp/m68k/av5282/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/av5282/preinstall.am
+++ b/c/src/lib/libbsp/m68k/av5282/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/csb360/preinstall.am b/c/src/lib/libbsp/m68k/csb360/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/csb360/preinstall.am
+++ b/c/src/lib/libbsp/m68k/csb360/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/dmv152/preinstall.am b/c/src/lib/libbsp/m68k/dmv152/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/dmv152/preinstall.am
+++ b/c/src/lib/libbsp/m68k/dmv152/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/gen68302/preinstall.am b/c/src/lib/libbsp/m68k/gen68302/preinstall.am
index 707296b288..08fe1a3193 100644
--- a/c/src/lib/libbsp/m68k/gen68302/preinstall.am
+++ b/c/src/lib/libbsp/m68k/gen68302/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/gen68340/preinstall.am b/c/src/lib/libbsp/m68k/gen68340/preinstall.am
index 04d7d04285..c05a1d3cca 100644
--- a/c/src/lib/libbsp/m68k/gen68340/preinstall.am
+++ b/c/src/lib/libbsp/m68k/gen68340/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/gen68360/preinstall.am b/c/src/lib/libbsp/m68k/gen68360/preinstall.am
index bd202b56b5..80ed291df0 100644
--- a/c/src/lib/libbsp/m68k/gen68360/preinstall.am
+++ b/c/src/lib/libbsp/m68k/gen68360/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/idp/preinstall.am b/c/src/lib/libbsp/m68k/idp/preinstall.am
index b1b8ae9549..38f89e1da9 100644
--- a/c/src/lib/libbsp/m68k/idp/preinstall.am
+++ b/c/src/lib/libbsp/m68k/idp/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mcf5206elite/preinstall.am b/c/src/lib/libbsp/m68k/mcf5206elite/preinstall.am
index 2e99a2fced..a167a9cce1 100644
--- a/c/src/lib/libbsp/m68k/mcf5206elite/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mcf5206elite/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mcf5235/preinstall.am b/c/src/lib/libbsp/m68k/mcf5235/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/mcf5235/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mcf5235/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mrm332/preinstall.am b/c/src/lib/libbsp/m68k/mrm332/preinstall.am
index 5a7ee704d4..84222fc09d 100644
--- a/c/src/lib/libbsp/m68k/mrm332/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mrm332/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mvme136/preinstall.am b/c/src/lib/libbsp/m68k/mvme136/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/mvme136/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mvme136/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mvme147/preinstall.am b/c/src/lib/libbsp/m68k/mvme147/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/mvme147/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mvme147/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mvme147s/preinstall.am b/c/src/lib/libbsp/m68k/mvme147s/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/mvme147s/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mvme147s/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mvme162/preinstall.am b/c/src/lib/libbsp/m68k/mvme162/preinstall.am
index b824416e2e..48043e72c9 100644
--- a/c/src/lib/libbsp/m68k/mvme162/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mvme162/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/mvme167/preinstall.am b/c/src/lib/libbsp/m68k/mvme167/preinstall.am
index e9798ece85..6a610640cb 100644
--- a/c/src/lib/libbsp/m68k/mvme167/preinstall.am
+++ b/c/src/lib/libbsp/m68k/mvme167/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/ods68302/preinstall.am b/c/src/lib/libbsp/m68k/ods68302/preinstall.am
index 1a094a835d..dba5e44c8a 100644
--- a/c/src/lib/libbsp/m68k/ods68302/preinstall.am
+++ b/c/src/lib/libbsp/m68k/ods68302/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/sim68000/preinstall.am b/c/src/lib/libbsp/m68k/sim68000/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/m68k/sim68000/preinstall.am
+++ b/c/src/lib/libbsp/m68k/sim68000/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/m68k/uC5282/preinstall.am b/c/src/lib/libbsp/m68k/uC5282/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/m68k/uC5282/preinstall.am
+++ b/c/src/lib/libbsp/m68k/uC5282/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/mips/csb350/preinstall.am b/c/src/lib/libbsp/mips/csb350/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/mips/csb350/preinstall.am
+++ b/c/src/lib/libbsp/mips/csb350/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/mips/genmongoosev/preinstall.am b/c/src/lib/libbsp/mips/genmongoosev/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/mips/genmongoosev/preinstall.am
+++ b/c/src/lib/libbsp/mips/genmongoosev/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/mips/jmr3904/preinstall.am b/c/src/lib/libbsp/mips/jmr3904/preinstall.am
index 7a1436592f..1ebeee04e9 100644
--- a/c/src/lib/libbsp/mips/jmr3904/preinstall.am
+++ b/c/src/lib/libbsp/mips/jmr3904/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/mips/p4000/preinstall.am b/c/src/lib/libbsp/mips/p4000/preinstall.am
index 445d38e94a..b909bc5de8 100644
--- a/c/src/lib/libbsp/mips/p4000/preinstall.am
+++ b/c/src/lib/libbsp/mips/p4000/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/no_cpu/no_bsp/preinstall.am b/c/src/lib/libbsp/no_cpu/no_bsp/preinstall.am
index 2a0ed19a01..3e82752f21 100644
--- a/c/src/lib/libbsp/no_cpu/no_bsp/preinstall.am
+++ b/c/src/lib/libbsp/no_cpu/no_bsp/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_LIB)/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_LIB)
diff --git a/c/src/lib/libbsp/powerpc/ep1a/preinstall.am b/c/src/lib/libbsp/powerpc/ep1a/preinstall.am
index 22942093f4..a5e8e4d64c 100644
--- a/c/src/lib/libbsp/powerpc/ep1a/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/ep1a/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/gen405/preinstall.am b/c/src/lib/libbsp/powerpc/gen405/preinstall.am
index 2f83c99f6f..7f5c38e699 100644
--- a/c/src/lib/libbsp/powerpc/gen405/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/gen405/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_LIB)/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_LIB)
diff --git a/c/src/lib/libbsp/powerpc/gen5200/preinstall.am b/c/src/lib/libbsp/powerpc/gen5200/preinstall.am
index 79b0fe099c..f7359c0b07 100644
--- a/c/src/lib/libbsp/powerpc/gen5200/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/gen5200/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/helas403/preinstall.am b/c/src/lib/libbsp/powerpc/helas403/preinstall.am
index c5af200a64..757c8d7692 100644
--- a/c/src/lib/libbsp/powerpc/helas403/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/helas403/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_LIB)/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_LIB)
diff --git a/c/src/lib/libbsp/powerpc/mbx8xx/preinstall.am b/c/src/lib/libbsp/powerpc/mbx8xx/preinstall.am
index a6495d24c4..10d5ef2840 100644
--- a/c/src/lib/libbsp/powerpc/mbx8xx/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/mbx8xx/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_LIB)/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_LIB)
diff --git a/c/src/lib/libbsp/powerpc/motorola_powerpc/preinstall.am b/c/src/lib/libbsp/powerpc/motorola_powerpc/preinstall.am
index e374f18c20..e3ac6535f8 100644
--- a/c/src/lib/libbsp/powerpc/motorola_powerpc/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/motorola_powerpc/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/mpc8260ads/preinstall.am b/c/src/lib/libbsp/powerpc/mpc8260ads/preinstall.am
index 215da96fe1..a49d3ec895 100644
--- a/c/src/lib/libbsp/powerpc/mpc8260ads/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/mpc8260ads/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/mvme5500/preinstall.am b/c/src/lib/libbsp/powerpc/mvme5500/preinstall.am
index 13e74064c4..f212b09fae 100644
--- a/c/src/lib/libbsp/powerpc/mvme5500/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/mvme5500/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/psim/preinstall.am b/c/src/lib/libbsp/powerpc/psim/preinstall.am
index 401324bba4..52c8668a8f 100644
--- a/c/src/lib/libbsp/powerpc/psim/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/psim/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/score603e/preinstall.am b/c/src/lib/libbsp/powerpc/score603e/preinstall.am
index 7959fcd217..164c216f8a 100644
--- a/c/src/lib/libbsp/powerpc/score603e/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/score603e/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/powerpc/ss555/preinstall.am b/c/src/lib/libbsp/powerpc/ss555/preinstall.am
index ebf4244ab1..3e0d09d6a0 100644
--- a/c/src/lib/libbsp/powerpc/ss555/preinstall.am
+++ b/c/src/lib/libbsp/powerpc/ss555/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_LIB)/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_LIB)
diff --git a/c/src/lib/libbsp/sparc/erc32/preinstall.am b/c/src/lib/libbsp/sparc/erc32/preinstall.am
index 5fb17ec903..2851fc8d47 100644
--- a/c/src/lib/libbsp/sparc/erc32/preinstall.am
+++ b/c/src/lib/libbsp/sparc/erc32/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/sparc/leon2/preinstall.am b/c/src/lib/libbsp/sparc/leon2/preinstall.am
index fcc6dd6d66..3afa593f31 100644
--- a/c/src/lib/libbsp/sparc/leon2/preinstall.am
+++ b/c/src/lib/libbsp/sparc/leon2/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/sparc/leon3/preinstall.am b/c/src/lib/libbsp/sparc/leon3/preinstall.am
index 3d0b6cbd16..36feb1ca41 100644
--- a/c/src/lib/libbsp/sparc/leon3/preinstall.am
+++ b/c/src/lib/libbsp/sparc/leon3/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libbsp/unix/posix/preinstall.am b/c/src/lib/libbsp/unix/posix/preinstall.am
index 064c6a795b..528030df2b 100644
--- a/c/src/lib/libbsp/unix/posix/preinstall.am
+++ b/c/src/lib/libbsp/unix/posix/preinstall.am
@@ -9,7 +9,7 @@ PREINSTALL_DIRS =
 DISTCLEANFILES += $(PREINSTALL_DIRS)
 
 TMPINSTALL_FILES =
-CLEANFILES += $(TMPINSTALL_FILES)
+CLEANFILES = $(TMPINSTALL_FILES)
 
 PREINSTALL_FILES =
 CLEANFILES += $(PREINSTALL_FILES)
diff --git a/c/src/lib/libcpu/arm/preinstall.am b/c/src/lib/libcpu/arm/preinstall.am
index 406d4a849d..cbf4d26cb0 100644
--- a/c/src/lib/libcpu/arm/preinstall.am
+++ b/c/src/lib/libcpu/arm/preinstall.am
@@ -6,10 +6,15 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
+
+$(PROJECT_INCLUDE)/$(dirstamp):
+	@$(mkdir_p) $(PROJECT_INCLUDE)
+	@: > $(PROJECT_INCLUDE)/$(dirstamp)
+PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
 
 if shared
 $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
@@ -22,11 +27,6 @@ $(PROJECT_INCLUDE)/libcpu/mmu.h: shared/include/mmu.h $(PROJECT_INCLUDE)/libcpu/
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/mmu.h
 endif
 if at91rm9200
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/at91rm9200.h: at91rm9200/include/at91rm9200.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/at91rm9200.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/at91rm9200.h
@@ -60,11 +60,6 @@ $(PROJECT_INCLUDE)/irq.h: at91rm9200/irq/irq.h $(PROJECT_INCLUDE)/$(dirstamp)
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/irq.h
 endif
 if mc9328mxl
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/mc9328mxl.h: mc9328mxl/include/mc9328mxl.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/mc9328mxl.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/mc9328mxl.h
@@ -74,11 +69,6 @@ $(PROJECT_INCLUDE)/irq.h: mc9328mxl/irq/irq.h $(PROJECT_INCLUDE)/$(dirstamp)
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/irq.h
 endif
 if s3c2400
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/s3c2400.h: s3c2400/include/s3c2400.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/s3c2400.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/s3c2400.h
diff --git a/c/src/lib/libcpu/i386/preinstall.am b/c/src/lib/libcpu/i386/preinstall.am
index b2cd7553e3..5d1b70f097 100644
--- a/c/src/lib/libcpu/i386/preinstall.am
+++ b/c/src/lib/libcpu/i386/preinstall.am
@@ -6,10 +6,10 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_INCLUDE)/libcpu
diff --git a/c/src/lib/libcpu/m68k/preinstall.am b/c/src/lib/libcpu/m68k/preinstall.am
index 9eef2da065..9ea06eed11 100644
--- a/c/src/lib/libcpu/m68k/preinstall.am
+++ b/c/src/lib/libcpu/m68k/preinstall.am
@@ -6,10 +6,10 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 if shared
 $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
diff --git a/c/src/lib/libcpu/mips/preinstall.am b/c/src/lib/libcpu/mips/preinstall.am
index ae546e662e..8f527ae8f6 100644
--- a/c/src/lib/libcpu/mips/preinstall.am
+++ b/c/src/lib/libcpu/mips/preinstall.am
@@ -6,10 +6,10 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_INCLUDE)/libcpu
diff --git a/c/src/lib/libcpu/powerpc/preinstall.am b/c/src/lib/libcpu/powerpc/preinstall.am
index 4ccf5ac582..00842d999d 100644
--- a/c/src/lib/libcpu/powerpc/preinstall.am
+++ b/c/src/lib/libcpu/powerpc/preinstall.am
@@ -6,10 +6,15 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
+
+$(PROJECT_INCLUDE)/$(dirstamp):
+	@$(mkdir_p) $(PROJECT_INCLUDE)
+	@: > $(PROJECT_INCLUDE)/$(dirstamp)
+PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
 
 $(PROJECT_INCLUDE)/rtems/powerpc/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_INCLUDE)/rtems/powerpc
@@ -81,11 +86,6 @@ $(PROJECT_INCLUDE)/libcpu/stackTrace.h: shared/src/stackTrace.h $(PROJECT_INCLUD
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/stackTrace.h
 endif
 if ppc403
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/ictrl.h: ppc403/ictrl/ictrl.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/ictrl.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/ictrl.h
@@ -102,11 +102,6 @@ $(PROJECT_INCLUDE)/mpc5xx/$(dirstamp):
 	@: > $(PROJECT_INCLUDE)/mpc5xx/$(dirstamp)
 PREINSTALL_DIRS += $(PROJECT_INCLUDE)/mpc5xx/$(dirstamp)
 
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/mpc5xx.h: mpc5xx/include/mpc5xx.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/mpc5xx.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/mpc5xx.h
@@ -128,11 +123,6 @@ $(PROJECT_INCLUDE)/libcpu/vectors.h: mpc5xx/vectors/vectors.h $(PROJECT_INCLUDE)
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/vectors.h
 endif
 if mpc505
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/ictrl.h: mpc505/ictrl/ictrl.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/ictrl.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/ictrl.h
@@ -160,11 +150,6 @@ $(PROJECT_INCLUDE)/mpc8xx/$(dirstamp):
 	@: > $(PROJECT_INCLUDE)/mpc8xx/$(dirstamp)
 PREINSTALL_DIRS += $(PROJECT_INCLUDE)/mpc8xx/$(dirstamp)
 
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/mpc8xx.h: mpc8xx/include/mpc8xx.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/mpc8xx.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/mpc8xx.h
@@ -191,11 +176,6 @@ $(PROJECT_INCLUDE)/mpc8260/$(dirstamp):
 	@: > $(PROJECT_INCLUDE)/mpc8260/$(dirstamp)
 PREINSTALL_DIRS += $(PROJECT_INCLUDE)/mpc8260/$(dirstamp)
 
-$(PROJECT_INCLUDE)/$(dirstamp):
-	@$(mkdir_p) $(PROJECT_INCLUDE)
-	@: > $(PROJECT_INCLUDE)/$(dirstamp)
-PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
-
 $(PROJECT_INCLUDE)/mpc8260.h: mpc8260/include/mpc8260.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/mpc8260.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/mpc8260.h
diff --git a/c/src/lib/libcpu/sh/preinstall.am b/c/src/lib/libcpu/sh/preinstall.am
index 835ddcdf6d..d679761a94 100644
--- a/c/src/lib/libcpu/sh/preinstall.am
+++ b/c/src/lib/libcpu/sh/preinstall.am
@@ -6,10 +6,10 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 if sh7032
 $(PROJECT_INCLUDE)/sh/$(dirstamp):
diff --git a/c/src/lib/libcpu/sparc/preinstall.am b/c/src/lib/libcpu/sparc/preinstall.am
index ffeb2e98de..c557175689 100644
--- a/c/src/lib/libcpu/sparc/preinstall.am
+++ b/c/src/lib/libcpu/sparc/preinstall.am
@@ -6,10 +6,10 @@ $(srcdir)/preinstall.am: Makefile.am
 endif
 
 PREINSTALL_DIRS =
-DISTCLEANFILES += $(PREINSTALL_DIRS)
+DISTCLEANFILES = $(PREINSTALL_DIRS)
 
 PREINSTALL_FILES =
-CLEANFILES += $(PREINSTALL_FILES)
+CLEANFILES = $(PREINSTALL_FILES)
 
 $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_INCLUDE)/libcpu