meson: use files() for srcs list

Meson looks up if the file xyz.c exists when calling file('xyz.c').
Furthermore it keeps track of the directory of the file. This is handy
when using multiple directories.

Change-Id: I346b5468b4203f1521ec73a90f93ff3b13ebf43c
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/64384
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

meson.build

@@ -178,8 +178,7 @@ endif
 
 # some programmers require libusb
 if get_option('usb')
-  srcs += 'usbdev.c'
-  srcs += 'usb_device.c'
+  srcs += files('usbdev.c', 'usb_device.c')
   deps += dependency('libusb-1.0')
 elif need_libusb1
   error('usb is disabled but one or more enabled programmer requires USB access')
@@ -187,7 +186,7 @@ endif
 
 # some programmers require libpci
 if get_option('pciutils')
-  srcs += 'pcidev.c'
+  srcs += files('pcidev.c')
   deps += dependency('libpci')
 elif need_libpci
   error('pciutils is disabled but one or more enabled programmer requires PCI access')
@@ -203,77 +202,81 @@ endif
 
 # set defines for configured programmers
 if config_atahpt
-  srcs += 'atahpt.c'
+  srcs += files('atahpt.c')
   cargs += '-DCONFIG_ATAHPT=1'
 endif
 if config_atapromise
-  srcs += 'atapromise.c'
+  srcs += files('atapromise.c')
   cargs += '-DCONFIG_ATAPROMISE=1'
 endif
 if config_atavia
-  srcs += 'atavia.c'
+  srcs += files('atavia.c')
   cargs += '-DCONFIG_ATAVIA=1'
 endif
 if config_buspirate_spi
-  srcs += 'buspirate_spi.c'
+  srcs += files('buspirate_spi.c')
   cargs += '-DCONFIG_BUSPIRATE_SPI=1'
 endif
 if config_ch341a_spi
-  srcs += 'ch341a_spi.c'
+  srcs += files('ch341a_spi.c')
   cargs += '-DCONFIG_CH341A_SPI=1'
 endif
 if config_dediprog
-  srcs += 'dediprog.c'
+  srcs += files('dediprog.c')
   cargs += '-DCONFIG_DEDIPROG=1'
 endif
 if config_developerbox_spi
-  srcs += 'developerbox_spi.c'
+  srcs += files('developerbox_spi.c')
   cargs += '-DCONFIG_DEVELOPERBOX_SPI=1'
 endif
 if config_digilent_spi
-  srcs += 'digilent_spi.c'
+  srcs += files('digilent_spi.c')
   cargs += '-DCONFIG_DIGILENT_SPI=1'
 endif
 if config_jlink_spi
-  srcs += 'jlink_spi.c'
+  srcs += files('jlink_spi.c')
   cargs += '-DCONFIG_JLINK_SPI=1'
 endif
 if config_drkaiser
-  srcs += 'drkaiser.c'
+  srcs += files('drkaiser.c')
   cargs += '-DCONFIG_DRKAISER=1'
 endif
 if config_dummy
-  srcs += 'dummyflasher.c'
+  srcs += files('dummyflasher.c')
   cargs += '-DCONFIG_DUMMY=1'
 endif
 if config_ft2232_spi
-  srcs += 'ft2232_spi.c'
+  srcs += files('ft2232_spi.c')
   cargs += '-DCONFIG_FT2232_SPI=1'
   cargs += '-DHAVE_FT232H=1'
 endif
 if config_gfxnvidia
-  srcs += 'gfxnvidia.c'
+  srcs += files('gfxnvidia.c')
   cargs += '-DCONFIG_GFXNVIDIA=1'
 endif
 if config_raiden_debug_spi
-  srcs += 'raiden_debug_spi.c'
+  srcs += files('raiden_debug_spi.c')
   cargs += '-DCONFIG_RAIDEN_DEBUG_SPI=1'
 endif
 if config_internal
-  srcs += 'board_enable.c'
-  srcs += 'cbtable.c'
-  srcs += 'chipset_enable.c'
-  srcs += 'internal.c'
-  srcs += 'processor_enable.c'
+  srcs += files(
+    'board_enable.c',
+    'cbtable.c',
+    'chipset_enable.c',
+    'internal.c',
+    'processor_enable.c',
+  )
   if host_is_x86
-    srcs += 'amd_imc.c'
-    srcs += 'dmi.c'
-    srcs += 'ichspi.c'
-    srcs += 'it85spi.c'
-    srcs += 'it87spi.c'
-    srcs += 'mcp6x_spi.c'
-    srcs += 'sb600spi.c'
-    srcs += 'wbsio_spi.c'
+    srcs += files(
+      'amd_imc.c',
+      'dmi.c',
+      'ichspi.c',
+      'it85spi.c',
+      'it87spi.c',
+      'mcp6x_spi.c',
+      'sb600spi.c',
+      'wbsio_spi.c',
+    )
   endif
   cargs += '-DCONFIG_INTERNAL=1'
   if get_option('config_internal_dmi')
@@ -282,129 +285,129 @@ if config_internal
   endif
 endif
 if config_it8212
-  srcs += 'it8212.c'
+  srcs += files('it8212.c')
   cargs += '-DCONFIG_IT8212=1'
 endif
 if config_linux_mtd
-  srcs += 'linux_mtd.c'
+  srcs += files('linux_mtd.c')
   cargs += '-DCONFIG_LINUX_MTD=1'
 endif
 if config_linux_spi
-  srcs += 'linux_spi.c'
+  srcs += files('linux_spi.c')
   cargs += '-DCONFIG_LINUX_SPI=1'
 endif
 if config_mstarddc_spi
-  srcs += 'mstarddc_spi.c'
+  srcs += files('mstarddc_spi.c')
   cargs += '-DCONFIG_MSTARDDC_SPI=1'
 endif
 if config_nic3com
-  srcs += 'nic3com.c'
+  srcs += files('nic3com.c')
   cargs += '-DCONFIG_NIC3COM=1'
 endif
 if config_nicintel
-  srcs += 'nicintel.c'
+  srcs += files('nicintel.c')
   cargs += '-DCONFIG_NICINTEL=1'
 endif
 if config_nicintel_eeprom
-  srcs += 'nicintel_eeprom.c'
+  srcs += files('nicintel_eeprom.c')
   cargs += '-DCONFIG_NICINTEL_EEPROM=1'
 endif
 if config_nicintel_spi
-  srcs += 'nicintel_spi.c'
+  srcs += files('nicintel_spi.c')
   cargs += '-DCONFIG_NICINTEL_SPI=1'
 endif
 if config_nicnatsemi
-  srcs += 'nicnatsemi.c'
+  srcs += files('nicnatsemi.c')
   cargs += '-DCONFIG_NICNATSEMI=1'
 endif
 if config_nicrealtek
-  srcs += 'nicrealtek.c'
+  srcs += files('nicrealtek.c')
   cargs += '-DCONFIG_NICREALTEK=1'
 endif
 if config_ogp_spi
-  srcs += 'ogp_spi.c'
+  srcs += files('ogp_spi.c')
   cargs += '-DCONFIG_OGP_SPI=1'
 endif
 if config_pickit2_spi
-  srcs += 'pickit2_spi.c'
+  srcs += files('pickit2_spi.c')
   cargs += '-DCONFIG_PICKIT2_SPI=1'
 endif
 if config_pony_spi
-  srcs += 'pony_spi.c'
+  srcs += files('pony_spi.c')
   cargs += '-DCONFIG_PONY_SPI=1'
 endif
 if config_rayer_spi
-  srcs += 'rayer_spi.c'
+  srcs += files('rayer_spi.c')
   cargs += '-DCONFIG_RAYER_SPI=1'
 endif
 if config_satamv
-  srcs += 'satamv.c'
+  srcs += files('satamv.c')
   cargs += '-DCONFIG_SATAMV=1'
 endif
 if config_satasii
-  srcs += 'satasii.c'
+  srcs += files('satasii.c')
   cargs += '-DCONFIG_SATASII=1'
 endif
 if config_serprog
-  srcs += 'serprog.c'
+  srcs += files('serprog.c')
   cargs += '-DCONFIG_SERPROG=1'
 endif
 if config_usbblaster_spi
-  srcs += 'usbblaster_spi.c'
+  srcs += files('usbblaster_spi.c')
   cargs += '-DCONFIG_USBBLASTER_SPI=1'
 endif
 if config_stlinkv3_spi
-  srcs += 'stlinkv3_spi.c'
+  srcs += files('stlinkv3_spi.c')
   cargs += '-DCONFIG_STLINKV3_SPI=1'
 endif
 if config_lspcon_i2c_spi
-  srcs += 'lspcon_i2c_spi.c'
+  srcs += files('lspcon_i2c_spi.c')
   cargs += '-DCONFIG_LSPCON_I2C_SPI=1'
 endif
 if config_mediatek_i2c_spi
-  srcs += 'mediatek_i2c_spi.c'
+  srcs += files('mediatek_i2c_spi.c')
   cargs += '-DCONFIG_MEDIATEK_I2C_SPI=1'
 endif
 if config_realtek_mst_i2c_spi
-  srcs += 'realtek_mst_i2c_spi.c'
+  srcs += files('realtek_mst_i2c_spi.c')
   cargs += '-DCONFIG_REALTEK_MST_I2C_SPI=1'
 endif
 
 # bitbanging SPI infrastructure
 if need_bitbang_spi
-  srcs += 'bitbang_spi.c'
+  srcs += files('bitbang_spi.c')
   cargs += '-DCONFIG_BITBANG_SPI=1'
 endif
 
 if host_machine.system() == 'linux'
-  srcs += 'i2c_helper_linux.c'
+  srcs += files('i2c_helper_linux.c')
 endif
 
 if need_raw_mem_access
-  srcs += 'hwaccess_physmap.c'
+  srcs += files('hwaccess_physmap.c')
 endif
 
 if need_x86_port_io
-  srcs += 'hwaccess_x86_io.c'
+  srcs += files('hwaccess_x86_io.c')
   cargs += '-D__FLASHROM_HAVE_OUTB__=1'
 endif
 
 if need_x86_msr
-  srcs += 'hwaccess_x86_msr.c'
+  srcs += files('hwaccess_x86_msr.c')
 endif
 
 # raw serial IO
 if need_serial
-  srcs += 'serial.c'
+  srcs += files('serial.c')
   if host_machine.system() == 'linux'
-    srcs += 'custom_baud_linux.c'
+    srcs += files('custom_baud_linux.c')
   else
-    srcs += 'custom_baud.c'
+    srcs += files('custom_baud.c')
   endif
 endif
 
 if config_print_wiki
-  srcs += 'print_wiki.c'
+  srcs += files('print_wiki.c')
   cargs += '-DCONFIG_PRINT_WIKI=1'
 endif