diff --git a/bsp/amebaz/SConstruct b/bsp/amebaz/SConstruct
index 19506eba01..713fe15443 100644
--- a/bsp/amebaz/SConstruct
+++ b/bsp/amebaz/SConstruct
@@ -27,7 +27,7 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/gd32303e-eval/SConstruct b/bsp/gd32303e-eval/SConstruct
index 4e05637e6a..1cdbaab4a8 100644
--- a/bsp/gd32303e-eval/SConstruct
+++ b/bsp/gd32303e-eval/SConstruct
@@ -27,7 +27,7 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/gd32450z-eval/SConstruct b/bsp/gd32450z-eval/SConstruct
index 27ac9b0241..adf9077eac 100644
--- a/bsp/gd32450z-eval/SConstruct
+++ b/bsp/gd32450z-eval/SConstruct
@@ -27,7 +27,7 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/imxrt/imxrt1050-ArchMix/SConstruct b/bsp/imxrt/imxrt1050-ArchMix/SConstruct
index ea53aac131..2b4a2ead73 100644
--- a/bsp/imxrt/imxrt1050-ArchMix/SConstruct
+++ b/bsp/imxrt/imxrt1050-ArchMix/SConstruct
@@ -35,7 +35,7 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/imxrt/imxrt1050-evk/SConstruct b/bsp/imxrt/imxrt1050-evk/SConstruct
index 5f99b4eed1..4b172a3538 100644
--- a/bsp/imxrt/imxrt1050-evk/SConstruct
+++ b/bsp/imxrt/imxrt1050-evk/SConstruct
@@ -35,7 +35,7 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/imxrt1052-evk/SConstruct b/bsp/imxrt1052-evk/SConstruct
index f6e51cbf6a..be5ba963ce 100644
--- a/bsp/imxrt1052-evk/SConstruct
+++ b/bsp/imxrt1052-evk/SConstruct
@@ -34,9 +34,9 @@ else:
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(ARFLAGS = [''])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/lpc54114-lite/SConstruct b/bsp/lpc54114-lite/SConstruct
index ab84f82f3c..aa0f6a15a3 100644
--- a/bsp/lpc54114-lite/SConstruct
+++ b/bsp/lpc54114-lite/SConstruct
@@ -28,7 +28,7 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
     env.Replace(ARFLAGS = [''])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/lpc824/SConstruct b/bsp/lpc824/SConstruct
index 9d111f8821..a87696475d 100644
--- a/bsp/lpc824/SConstruct
+++ b/bsp/lpc824/SConstruct
@@ -22,9 +22,9 @@ env = Environment(tools = ['mingw'],
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(ARFLAGS = [''])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/mb9bf500r/SConstruct b/bsp/mb9bf500r/SConstruct
index 1deefb8ffd..be2a125e2c 100644
--- a/bsp/mb9bf500r/SConstruct
+++ b/bsp/mb9bf500r/SConstruct
@@ -20,9 +20,9 @@ env = Environment(tools = ['mingw'],
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
-	env.Replace(ARFLAGS = '')
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/mb9bf506r/SConstruct b/bsp/mb9bf506r/SConstruct
index 8c58439102..5c060833f4 100644
--- a/bsp/mb9bf506r/SConstruct
+++ b/bsp/mb9bf506r/SConstruct
@@ -20,9 +20,9 @@ env = Environment(tools = ['mingw'],
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
-	env.Replace(ARFLAGS = '')
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/mb9bf618s/SConstruct b/bsp/mb9bf618s/SConstruct
index 8c58439102..5c060833f4 100644
--- a/bsp/mb9bf618s/SConstruct
+++ b/bsp/mb9bf618s/SConstruct
@@ -20,9 +20,9 @@ env = Environment(tools = ['mingw'],
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
-	env.Replace(ARFLAGS = '')
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/nuvoton_nuc472/SConstruct b/bsp/nuvoton_nuc472/SConstruct
index ece15e2a05..9257163aef 100644
--- a/bsp/nuvoton_nuc472/SConstruct
+++ b/bsp/nuvoton_nuc472/SConstruct
@@ -20,9 +20,9 @@ env = Environment(tools = ['mingw'],
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(ARFLAGS = [''])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map project.map'])
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/swm320-lq100/SConstruct b/bsp/swm320-lq100/SConstruct
index 331f1056f5..44567aea78 100644
--- a/bsp/swm320-lq100/SConstruct
+++ b/bsp/swm320-lq100/SConstruct
@@ -25,9 +25,9 @@ env = Environment(tools = ['mingw'],
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
-	env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-	env.Replace(ARFLAGS = [''])
-	env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -o $TARGET --map rtthread.map'])
+    env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/bsp/upd70f3454/SConstruct b/bsp/upd70f3454/SConstruct
index 589cdbeb80..a342385d85 100644
--- a/bsp/upd70f3454/SConstruct
+++ b/bsp/upd70f3454/SConstruct
@@ -21,8 +21,8 @@ env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 if rtconfig.PLATFORM == 'iar':
     env.Replace(CCCOM = ['$CC $CCFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
-    env.Replace(LINKCOM = ['$LINK $SOURCES $LINKFLAGS -f lnk70f3454.xcl -l rtthread.map -Omotorola-s28=$TARGET'])
-    env.Replace(ARFLAGS = '')
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
 
 Export('RTT_ROOT')
 Export('rtconfig')
diff --git a/tools/building.py b/tools/building.py
index ef1cb3da66..978c0f7237 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -273,6 +273,13 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
         env['LIBLINKSUFFIX'] = '.lib'
         env['LIBDIRPREFIX'] = '--userlibpath '
 
+    elif rtconfig.PLATFORM == 'iar':
+        env['LIBPREFIX'] = ''
+        env['LIBSUFFIX'] = '.a'
+        env['LIBLINKPREFIX'] = ''
+        env['LIBLINKSUFFIX'] = '.a'
+        env['LIBDIRPREFIX'] = '--search '
+
     # patch for win32 spawn
     if env['PLATFORM'] == 'win32':
         win32_spawn = Win32Spawn()