1# $FreeBSD$ 2# 3# This file contains common settings used for building FreeBSD 4# sources. 5 6# Enable various levels of compiler warning checks. These may be 7# overridden (e.g. if using a non-gcc compiler) by defining NO_WARNS. 8 9# for GCC: http://gcc.gnu.org/onlinedocs/gcc-3.0.4/gcc_3.html#IDX143 10 11# the default is gnu99 for now 12CSTD ?= gnu99 13 14.if ${CSTD} == "k&r" 15CFLAGS += -traditional 16.elif ${CSTD} == "c89" || ${CSTD} == "c90" 17CFLAGS += -std=iso9899:1990 18.elif ${CSTD} == "c94" || ${CSTD} == "c95" 19CFLAGS += -std=iso9899:199409 20.elif ${CSTD} == "c99" 21CFLAGS += -std=iso9899:1999 22.else 23CFLAGS += -std=${CSTD} 24.endif 25.if !defined(NO_WARNS) 26# -pedantic is problematic because it also imposes namespace restrictions 27#CFLAGS += -pedantic 28. if defined(WARNS) 29. if ${WARNS} >= 1 30CWARNFLAGS += -Wsystem-headers 31. if !defined(NO_WERROR) 32CWARNFLAGS += -Werror 33. endif 34. endif 35. if ${WARNS} >= 2 36CWARNFLAGS += -Wall -Wno-format-y2k 37. endif 38. if ${WARNS} >= 3 39CWARNFLAGS += -W -Wno-unused-parameter -Wstrict-prototypes\ 40 -Wmissing-prototypes -Wpointer-arith 41. endif 42. if ${WARNS} >= 4 43CWARNFLAGS += -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch\ 44 -Wshadow -Wunused-parameter 45. if !defined(NO_WCAST_ALIGN) 46CWARNFLAGS += -Wcast-align 47. endif 48. endif 49# BDECFLAGS 50. if ${WARNS} >= 6 51CWARNFLAGS += -Wchar-subscripts -Winline -Wnested-externs\ 52 -Wredundant-decls -Wold-style-definition 53. endif 54. if ${WARNS} >= 2 && ${WARNS} <= 4 55# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 56# XXX always get it right. 57CWARNFLAGS += -Wno-uninitialized 58. endif 59CWARNFLAGS += -Wno-pointer-sign 60# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 61# is set to low values, these have to be disabled explicitly. 62. if ${CC:T:Mclang} == "clang" 63. if ${WARNS} <= 3 64CWARNFLAGS += -Wno-tautological-compare -Wno-unused-value\ 65 -Wno-parentheses-equality 66. endif 67. if ${WARNS} <= 2 68CWARNFLAGS += -Wno-switch-enum 69. endif 70. if ${WARNS} <= 1 71CWARNFLAGS += -Wno-parentheses 72. endif 73. endif 74. endif 75 76. if defined(FORMAT_AUDIT) 77WFORMAT = 1 78. endif 79. if defined(WFORMAT) 80. if ${WFORMAT} > 0 81#CWARNFLAGS += -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 82CWARNFLAGS += -Wformat=2 -Wno-format-extra-args 83. if !defined(NO_WERROR) 84CWARNFLAGS += -Werror 85. endif 86. endif 87. endif 88. if defined(NO_WFORMAT) 89CWARNFLAGS += -Wno-format 90. endif 91.endif 92 93.if defined(IGNORE_PRAGMA) 94CWARNFLAGS += -Wno-unknown-pragmas 95.endif 96 97.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 98 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 99# Don't use -Wstack-protector as it breaks world with -Werror. 100SSP_CFLAGS ?= -fstack-protector 101CFLAGS += ${SSP_CFLAGS} 102.endif 103 104# Allow user-specified additional warning flags 105CFLAGS += ${CWARNFLAGS} 106