diff --git a/bsp/amebaz/SConstruct b/bsp/amebaz/SConstruct
index 19506eba01f42310e81961b3bb56331f8990c9fd..713fe1544307e0b1c4b49165a5375a1665794411 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 4e05637e6a4347fcde95a84a3e1efb306046c14f..1cdbaab4a87a282cc5e79c430eea5eaaabc46e5d 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 27ac9b02419dfda077c18a3a04d68802cb44c120..adf9077eac4122428181b32e0310214d3596933f 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 ea53aac131e136d3dc6776315539c26c5479b275..2b4a2ead7324c498a101037e36b879a0d615dc70 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 5f99b4eed1e00824fe85faec1ea3824699637927..4b172a35387479079b23aa1da13c2641e27e6737 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 f6e51cbf6a96b483a73d271603149434b92aba63..be5ba963ce2af009bd1b5a576898c508af69e252 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 ab84f82f3ca3f24c75d62771c2014ae573651949..aa0f6a15a31cb465e7fce44740e75d084e3e8daf 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 9d111f88211820ddbc3fa343291d9365c5bdfbc0..a87696475dc26381b8ad6fdaaf70cd917d11c298 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 1deefb8ffd1cc9de7e3710c6b47c2d19fd3cd8e0..be2a125e2c90b806083a550b19a17def0fc0ba7b 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 8c58439102516b1cf32d998ff87f391489d48384..5c060833f4d2cdd1a58ddd09133b3636f86704c8 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 8c58439102516b1cf32d998ff87f391489d48384..5c060833f4d2cdd1a58ddd09133b3636f86704c8 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 ece15e2a05a08dd315e73b4351a603494951fff2..9257163aef00a74eec7406f24d75f870b25431dd 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 331f1056f5d786583776c4fa2148512721fbbd90..44567aea789095044b87d7e623dc941ebfd7de7b 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 589cdbeb800718a20e1092e02a68a793fdcf3478..a342385d852403ad1dd373ba4060f6bf0bf377cd 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 ef1cb3da6689ac030c215fb409cafbc53f5aa160..978c0f7237bcd8bf3d377356a7ef75f22bce485e 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()