build: Explicitly use bash for shell scripts

[vpp.git] / build-root / Makefile

diff --git a/build-root/Makefile b/build-root/Makefile
index d35b7a1..6416de2 100644 (file)
--- a/build-root/Makefile
+++ b/build-root/Makefile
@@ -39,7 +39,7 @@
 ######################################################################
 
 # Scripts require non-POSIX parts of bash
-SHELL := /bin/bash
+SHELL := $(shell which bash)
 
 # Where this makefile lives
 MU_BUILD_ROOT_DIR = $(shell pwd)
@@ -962,7 +962,7 @@ $(PLATFORM_IMAGE_DIR)/ro.img ro-image: $(patsubst %,%-find-source,$(ROOT_PACKAGE
        chmod 0755 $${tmp_dir} ;                                        \
        cd $${tmp_dir} ;                                                \
        trap "rm -rf $${tmp_dir}" err ;                                 \
-       fakeroot /bin/bash -c "{                                        \
+       fakeroot $(SHELL) -c "{                                 \
          set -eu$(BUILD_DEBUG) ;                                       \
          $(MAKE) -C $(MU_BUILD_ROOT_DIR) IMAGE_INSTALL_DIR=$${tmp_dir} \
            $(patsubst %,%-image_install,                               \
@@ -1054,7 +1054,7 @@ rw-image: rw-image-check-type ro-image
        chmod 0755 $${tmp_dir} ;                                \
        cd $${tmp_dir} ;                                        \
        trap "rm -rf $${tmp_dir}" err ;                         \
-       fakeroot /bin/bash -c "{                                \
+       fakeroot $(SHELL) -c "{                         \
          set -eu$(BUILD_DEBUG) ;                               \
          $(linuxrc_makedev) ;                                  \
          $(call rw_image_embed_ro_image_fn,$${ro_image}) ;     \